Not sure if this is best place or Github, anyway, using the 1.5alpha on CiviCRM 4.7.8 & Wordpress 4.5.3
When trying to access the Bookings - Find Bookings tab I get the following error
Fatal error: Access level to CRM_Booking_Form_Search::$_defaults must be public (as in class CRM_Core_Form) in /var/sites/h/hbb.org.uk/public_html/wp-content/plugins/files/civicrm/extensions/civibooking-1.5alpha/CRM/Booking/Form/Search.php on line 10
The rest of the alpha build seems to work great for me.