Trusted site - and very useful
I always refer to Tripadvisor prior to booking holiday accommodation. The site has taken a lot of worry from the online booking experience - before, it was impossible to know if a B&B/guesthouse or hotel was all it purported to be in its own advertising gumph. Naturally, reviews are written from a personal perspective, and therefore readers should take from them an overall picture, but I believe that the contributors generally give honest descriptions and opinions. When accompanied by photographic evidence, reviews can be invaluable and remove much of the risk from booking a holiday online.