#rottentomatoes is a great tool but make sure you're using it correctly.
The 'tomatometer' simply weighs good #reviews (normally 6/10 upwards) against bad reviews (normally 5/10 downwards). This means that if a #film only receives 6/10 reviews it'll get a 100% #tomatometer score.
Does that mean it's a masterpiece? No, it just means it's good and no one wrote a bad review about it. Obviously the opposite is also true so if a film only gets 5/10 reviews it'll show a 0% score which clearly isn't representative.
What you really want to pay attention to is the 'Average Rating' beneath. This gives you the literal average score based on all the reviews submitted and provides a much more accurate picture.
But of course, at the end of the day, the viewer is always the best judge. If you see something you wanna watch - just watch it!