Rooms for 1-4 people, the same price no matter how many, online booking and a system where you just rock up, type in the doorcode they've emailed to you and make yourself at home. Clean rooms, fantastic dead-centre locations, no nonsense. And do you know HOW MANY PEOPLE you can fit into a hotel room that has automated reception? Sweet.
The corridors sometimes look a little grotty, but the rooms are actually really clean and well fitted out!