I'd still give it a shot. The DIS is the only place I am hearing negative stuff about it. Perhaps they were expecting HSM? In fact you may like it more since you wouldn't have high expectations.
I watched it on Weds night and really enjoyed it. After reading this thread I decided to go back and watch it again. I enjoyed it even more the second time I watched it.
My DS was in show choir, and while the songs on the show were over the top, I would sometimes wonder who picked the music at some of the competitions they were at.
I watched it last night and liked it. Didn't love it, but am willing to watch a few more episodes before I stop recording it. Wouldn't let children anywhere near it, but for me I loved the fun poked at choir geeks and 'cheerios' alike! My Show Choir director was more like the cheer coach with the crazy, but I can relate!