diff --git a/golem_activity/models/golem_activity.py b/golem_activity/models/golem_activity.py
index 81de0ac..f398fa6 100644
--- a/golem_activity/models/golem_activity.py
+++ b/golem_activity/models/golem_activity.py
@@ -22,11 +22,7 @@ class ProductTemplate(models.Model):
     _inherit = 'product.template'
 
     # Make default service for type
-    type = fields.Selection([('consu', 'Consumable'), ('service', 'Service')],
-                            'Product Type', default='service', required=True,
-                            help="Consumable are product where you don't "
-                            "manage stock, a service is a non-material "
-                            "product provided by a company or an individual.")
+    type = fields.Selection(default='service')
 
 
 class GolemActivity(models.Model):
@@ -34,33 +30,34 @@ class GolemActivity(models.Model):
     _description = 'GOLEM Activity'
     _inherit = 'mail.thread'
     _inherits = {'product.template': 'product_id'}
+    _rec_name = 'activity_name'
 
     season_id = fields.Many2one('golem.season', string='Seasons',
                                 required=True)
-    animator = fields.Many2one('res.partner', string="Animator",
-                               domain=[('is_company', '=', False)])
+    animator_id = fields.Many2one('res.partner', string="Animator",
+                                  domain=[('is_company', '=', False)])
     places = fields.Integer('Places', default=0)
-    is_surcharged = fields.Boolean('Allow surcharge?', default=False)
-    places_surcharged = fields.Integer('Places with surcharge', default=0)
+    is_overbooked = fields.Boolean('Allow overbook?', default=False)
+    places_overbooked = fields.Integer('Places with overbook', default=0)
 
-    @api.onchange('is_surcharged', 'places')
-    def onchange_is_surcharged(self):
+    @api.onchange('is_overbooked', 'places')
+    def onchange_is_overbooked(self):
         for a in self:
-            if a.places and a.is_surcharged:
-                if not a.places_surcharged or (a.places_surcharged < a.places):
-                    a.places_surcharged = a.places
+            if a.places and a.is_overbooked:
+                if not a.places_overbooked or (a.places_overbooked < a.places):
+                    a.places_overbooked = a.places + 1
 
-    @api.constrains('places', 'places_surcharged')
+    @api.constrains('places', 'places_overbooked')
     def _check_places(self):
-        """ Check integers are signed and surcharged to be superior than
+        """ Check integers are signed and overbooked to be superior than
         normal places """
         for v in self:
-            for f in ['places', 'places_surcharged']:
+            for f in ['places', 'places_overbooked']:
                 if v[f] < 0:
                     emsg = _('Number of places cannot be negative.')
                     raise models.ValidationError(emsg)
-            if v.places < v.places_surcharged:
-                emsg = _('Surcharged places cannot be inferieur than places')
+            if v.is_overbooked and (v.places_overbooked <= v.places):
+                emsg = _('Overbooked places cannot be inferior than places')
                 raise models.ValidationError(emsg)
 
     date_start = fields.Date('Start date')
@@ -100,3 +97,16 @@ class GolemActivity(models.Model):
         default_season = self.env['golem.season'].search(domain)
         for a in self:
             a.is_current = (default_season == a.season_id)
+
+    activity_name = fields.Char('Name', compute='_compute_name', store=True,
+                                index=True)
+
+    @api.depends('name', 'default_code')
+    def _compute_name(self):
+        """ Provide a better displayed name """
+        for a in self:
+            activity_name = unicode(a.name)
+            if a.default_code:
+                activity_name = u'[{}] {}'.format(a.default_code,
+                                                  activity_name)
+            a.activity_name = activity_name
diff --git a/golem_activity/views/golem_activity_view.xml b/golem_activity/views/golem_activity_view.xml
index a402ff4..07d9cd8 100644
--- a/golem_activity/views/golem_activity_view.xml
+++ b/golem_activity/views/golem_activity_view.xml
@@ -25,7 +25,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
       <field name="arch" type="xml">
         <form>
           <sheet>
-            <group>
+              <div class="oe_right oe_button_box" style="width: 300px;"
+                name="buttons"></div>
               <div class="oe_left" style="width: 500px;">
                 <field name="image_medium" widget="image"
                   class="oe_avatar oe_left"/>
@@ -37,29 +38,24 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
               <group>
                 <field name="season_id" />
               </group>
-            </group>
             <group string="Details" col="4">
               <group colspan="2">
                 <field name="default_code" />
-                <field name="animator" />
+                <field name="categ_id" />
+                <field name="animator_id" />
                 <field name="list_price" />
               </group>
               <group colspan="2">
                 <field name="places" />
-                <field name="is_surcharged" />
-                <field name="places_surcharged"
-                  attrs="{'invisible': [('is_surcharged', '=', False)]}" />
+                <field name="is_overbooked" />
+                <field name="places_overbooked"
+                  attrs="{'invisible': [('is_overbooked', '=', False)]}" />
                 <field name="date_start" />
                 <field name="date_end" />
               </group>
             </group>
             <notebook>
               <page name="activity_info" string="Information">
-                <group colspan="4">
-                  <group>
-                    <field name="active"/>
-                  </group>
-                </group>
                 <group colspan="4">
                 <field name="description" placeholder="describe the activity characteristics..."/>
                 </group>
@@ -88,7 +84,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
       <field name="model">golem.activity</field>
       <field name="arch" type="xml">
         <search>
-          <field name="name" />
+          <field name="activity_name" />
           <field name="season_id" widget="many2one" />
           <filter name="season_default" string="Default season"
            domain="[('is_current', '=', True)]" />
@@ -98,16 +94,25 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
     <!-- Actions -->
-    <act_window id="action"
-      name="GOLEM Activities"
-      res_model="golem.activity"
-      view_mode="kanban,tree,form"
-      context="{'search_default_season_default': True}" />
+    <record id="action" model="ir.actions.act_window">
+      <field name="name">GOLEM Activities</field>
+      <field name="res_model">golem.activity</field>
+      <field name="view_mode">kanban,tree,form</field>
+      <field name="domain" eval="[('categ_id', 'child_of', ref('golem_activity.golem_product_category_all_activities'))]" />
+      <field name="context"
+        eval="{'search_default_season_default': True, 'default_categ_id': ref('golem_activity.golem_product_category_all_activities')}" />
+    </record>
     <record model="ir.actions.act_window.view" id="act_view_kanban">
       <field name="view_mode">kanban</field>
       <field name="view_id" ref="product.product_template_kanban_view"/>
       <field name="act_window_id" ref="action"/>
     </record>
+    <record id="category_action" model="ir.actions.act_window">
+      <field name="name">Activities Categories</field>
+      <field name="res_model">product.category</field>
+      <field name="view_type">form</field>
+      <field name="view_id" ref="product.product_category_list_view" />
+    </record>
 
     <!-- Menus -->
     <menuitem id="activity_menu" name="Activities"
@@ -115,6 +120,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
     <menuitem id="activity_list" name="List"
       parent="activity_menu" sequence="0"
       action="action" />
+    <menuitem  id="activity_categ" name="Activities categories"
+      parent="activity_menu" sequence="10"
+      action="category_action" />
 
   </data>
 </openerp>