I have only taken one class, and I loved it. It was a beginning 'quilting' class, although it was really a piecing class, no quilting. I had already completed two quilts, but taking the class made me want to kick myself for not taking advantage of that learning experience before bumbling thru on my own. I learned a lot, we had fun, and completed a very nice sampler quilt top.
I would like to take more classes, however, my LQS usually holds most of them during the day, and I work full time. That is my big problem. Content of some of the classes also doesn't interest me. I think taking a survey of what potential students want may be your best bet, and offering them in a time slot that working students can use.