Just go see it. You already bought the tickets, go and form your own opinion. You might actually like it!
I went in with low expectations and not entirely familiar with 80s rock music, and I loved the show! The plot is definitely weak, but it is a fun show.
You're going to get a range of opinions here because everyone has different taste. That's why the best thing to do is just see it (since you already have tickets), and decide for yourself.
"We like to snark around here. Sometimes we actually talk about theater...but we try not to let that get in our way." - dramamama611