I saw it and loved it! Okay, it was only ruined for me because I like the Broadway cast better, but unfortunately they would not be able to sell a movie since they are unknowns to most people. It was still really fun though and I want to see it again.
My newspaper reviewer gave it a horrible review, but he pretty much just wrote a bunch of crap to complain about and in the middle pretty much said he hates musicals. I bet he is just a closet ABBA fan who doesn't want to admit it.
And although I am only 24, I really was excited to see the stage production because I love the music. Heck, I was singing and dancing around my kitchen cooking on Wednesday listening to the Broadway cast album. And yes, definitely see the stage production if you can. Carolee Carmello as Donna is fantastic!