We saw it this evening with our 23mos ds(saw half then fell asleep), 5.5yo dd and 7.5yo ds and really liked it. Loved the music. It was very much like "Beauty and the Beast". It also felt like classical Disney as opposed to the "The Princess and the Frog" which we disliked highly. We almost walked out of that one. We didn't find "Tangled" any worse than "Beauty and the Beast". We are very conservative in what we let the kids watch. If you let your 3yo dd watch Beauty and the Beast and she was good, then you should be okay.
I actually cried twice, but I'm also about 11 weeks pregnant.