The Mrs. and I go to as many shows as we can. No they are not up to Vegas or Broadway standards, but in most cases are just fine. Like any other part of a cruise it's what you make of it. Don't expect too much and you won't be disappointed. Just remember, in most cases these are just kids trying to possibly work their way up to bigger and better things. Some will, some won't.
But if you think you way may apt to walking out, pick a seat in the back.