Here are the two biggest movie websites that offer legal streaming of movies and keep in mind that this is not an affiliate link.
Those are the two biggest however YouTube actually have some decent movies available to watch legally online for FREE. Hulu is another website that offers great legal content, here in the UK we have BBC Iplayer, 4od, Itv, demand 5 and many more. By using these sites you are not breaking any laws and nobody can come knocking at your door. Although Netflix does not have the latest films there quality is amazing, the buffering speed is simply the best, and quality is DVD constantly, no more cam quality copy’s just strictly decent quality.