I used to do her stuff religiously, but honestly didn't see major results. I also don't love her instructor style, which doesn't include a lot of guidance on the moves. You basically have to do them over and over so you memorize what's happening, since she never tells you anything! I don't love the dancing-style aerobics, either. Learning the choreography takes my heart rate down, and the whole thing just seems pointless.
I prefer more HIIT-style stuff - loads of better workouts on youtube or popsugar.