I do just about what you do. The newer Firms are rather easy. I never bother with that stupid stick, never purchased it to begin with. I have found that, for a change of pace, they are a good work out if you increase the weight they demonstrate with. I don't use as much as you do, but I at least double what the instructor is working out with.
I did Vol. #1 today for the first time in about 6 months. I found the floor exercises a bit challenging. The side leg lifts got to me today, but I have an injured hip, and I think that might have been why. (The hip injury is keeping me away from any tall box work.) I definately have tapes I like better, but my old Firms still have a place in my workout routine. I absolutely hate the sets, but I can tune stuff like that out easily.