I went to see it last week, its second week out. And, I have to say I was expecting it to be really bad. I went with a fellow Jem Girl, who had not seen any trailers but is a huge fan since childhood.
Shockingly IT WAS NOT!!! The trailers do NOT do it justice! Yes. Its NOT the same as the cartoon I adore, but theres just enough similarities and shout-outs to the original for it to be fun. And the music was truly outrageous! I bought the soundtrack on iTunes that night (only because its not available as an actual CD, Boo).
I plan to see it again. I will buy the DVD. So, my advice is give it a chance and have an open mind. You may find yourself humming one of the songs from the movie instead of the tv show....