Having seen the movie, and the original yesterday:
1) The original is still the best overall.
2) The movie has some hiccups when it tries to change things and comes off as odd instead -- using monster busses instead of the tractor scene. Among a couple others.
3) Some of the changes are for the better. The beginning of the remake is definitely improved dramatically. You see/understand why the community would ban dancing.
3) Some of the same scenes in the remake are actually leagues better somehow. The "bang your head!" scene beyond rocked. So did teaching Willard how to dance.
4) The prom scene made you want to get up and dance, they really pulled it off.
5) The acting was great, despite some hiccups - the warehouse scene was better in the original and seemed to have more emotion to it. Screaming "I'm not a virgin" elicited a couple laughs in the audience whereas it seemed more realistic in the original, perhaps due to the times perhaps due to the acting unsure.
6) Most of the scenes, however, recapture the magic of the original that you feel like you're seeing it for the first time. With this said, there are enough changes that I can say it was not a carbon copy -- having saw the original so close behind, it's only close in basic story structure and some of the scenes being similar. Only one noticeable word-for-word scene: Vi confronting her husband about how he may be a good preacher but needs to work on becoming a better father.
7) The music, where it was important, was the same as the original. There was only two hip-hop song beats, the rest was western music which I'm not that familiar with but I don't think the songs were that new either. Thus to those worrying about updated music, it's all classic - they kept Quiet Riot even.
8) The audience seemed to like it too. There was applause at the very end. Everyone was laughing and cheering and attentive the whole way through.
Overall, I'd rank the original 9/10 while the remake would be 8/10. It's still a good film. Entertaining. Very well made. Just unable to completely stand up to it's former, despite having some better scenes than the original, due to a couple of hiccups.