I went to see the show last night, and I really enjoyed myself. I sat with some tourists and we had a great time laughing and singing and dancing with the crowd.
Don't go for the meal. It's not that much nor is it haute cuisine. What I liked was the recreation of an Italian wedding. I've seen the "groom" in many local plays that tourists would never see, so it was an extra treat for me.
The singer who was the wedding entertainer was quite good, and there was a mix of music to please all ages.
I would recommend what others have said. If you go, look for discounted tickets. As for VIP tickets, they get you to the food line first (not a big deal), but you do sit very close to the wedding action. As the "theatre" is long and narrow, I would have hated being at the end by the stairs.