After reading through this thread again I have to say that I have a much better appreciation for the challenges that spin instructors face in designing their classes.

The diversity of needs and expectations on the part of those of us who take spin classes is pretty amazing! It is fortunate that the nature of the spin bike allows people to adjust a workout to suit their needs.

My hat (and bike helmet) is off to those of you who teach the classes and try to make them interesting and enjoyable!