We used Beatnix Central for a large stag-do in Brighton and had a great weekend.
Location, location, location and it is perfectly positioned - just a short walk from the beach, clubs, bars & restaurants.
The house itself is very well presented, some really nice touches, with the large kitchen/dining/lounge being the focal point. It is fully equipped with everything you could need for your stay.
Enough beds for everyone to have their own (although most rooms are shared between 5-6 people) and again comfortable with decent pillows & duvets.
Staff were very responsive and handled and questions quickly and easily.