I don't want to be mean, because the Rock Box is a nice, clean, family-oriented show, and those are hard to find these days. I appreciated that their Christmas show incorporated Scripture and was very God-centered. In this day and age, that's so refreshing for a public venue!
So, I applaud the Rock Box for presenting such a wholesome show. But musically speaking, it was almost unendurably bad. Cheap arrangements, bad songs, canned trax in the background, and basically talentless people on-stage. One or two nice voices in the cast (especially the talented African-American lady, who sang some powerful gospel and blues tunes), but I doubt most of these people could get hired in the real world. The impression I got is that the lead singers own the place, and that's the only way they'd ever be allowed to sing publicly.
The comedy acts also wore thin very, very quickly. The Barney Fife impersonator was funny for about three minutes, but after two hours, he was painful to watch.
If you aren't very picky, musically speaking, and want a nice clean show, I'm sure you'd enjoy the Rock Box. I, personally, could never force myself to go back.