I think so. I admit I use it if I need to quickly know the synopsis of a movie to decide whether it is worth seeing or not. It is also useful if I need to quickly see something like the top speed of a type of car or something like that (something that isn’t up to debate).
You're better of going to IMDB.
I find the ratings and the reviews pretty close to what I think of movies. Except for "The Godfather" winning every best of all time movies polls.