I signed up for both AIR BnB and COUCHSURFING last week as I was planning a lot of trips, but then quickly closed my accounts and decided I was better off just sifting through hotels or B&Bs. The glossy ad they have of someone sitting by a pool interacting with hosts in exotic locations is completely removed from reality. People took ages to respond and then there were all sorts of misunderstandings (oh, it is advertised as being free that weekend, but you have to take it for 4 days because I am going away on Thursday, so won't be there on Saturday to let you in....). Take my advice and just stick to sifting through the locations on TripAdvisor, because although anyone can write a review, I find most of them are honest. Do your own research and you can find much better in an establishment. Anyway, most of the AIR BnB places I looked into were MORE EXPENSIVE than an hotel - and you usually had to share a bathroom with the host, always a mistake, because I once worked in a hospital and I AM A STICKLER FOR CLEANLINESS!!! So my conclusions are that Air BnB sucks and Couchsurfing sounds like my idea of hell, the sort of site that attracts people who love to post on Farcebook (and I suspect it is largely a hook-up site for straights).