Yeah AirBnB hasn't really taken off here in the UK as it has elsewhere. Not sure if that's a cultural thing (letting your home out to strangers) or something else. Like you said, much better to stay at a hotel or B & B if travelling to the UK
On the plus side, my best Airbnb experiences were in Greece, there were some fantastic hosts (and houses).
I spent about 4 months "between homes" and Airbnb got me through most of it. It's a hugely mixed experience, but in many ways I'm glad I did it.