You can generally get a good picture of a restaurant, hotel, venue etc via Trip Adviser.
I tend to look and see if most of the reviews are 5, 4 and 3 rated or if the top of the bell curve is lower down. Like Rosie I've been put off but certain aspects such as location or numerous comments about unhelpful staff or cleanliness, but I disregard the odd 'disgruntled of Leamington Spa'.
Another reason to not have a death penalty
Bravery of Israeli passengers on plane


