OK - I have to admit I have seen this twice already, and if coerced, I would go again. It is wacky - weird in a lot of ways, but loads of fun. Pierce Brosnan can not really sing great - but he is great to look at, even at his age. Even the teenagers in our group thought he was a "hot old man". Meryl Streep is amazing in it. The music is so fun. It definitely took me back to my teen days. Abba songs - wow! Don't really remember enjoying them then as much as I did in this movie now.
Male warning - Jake went with us the first time I saw it. He leaned over to me about 1/2 way thru the movie and made a motion of slitting his wrists. His actual comment was, "I do not have enough estrogen to enjoy this movie". There were a handful of men in there, but all married and Jake was sure their wives had forced them to come. The second time I saw it, the theatre was about 3/4 full and there were no men present.
So, if you are just looking for a bit of nonsense fun - go see it! I LOVED it, both times!!