They're great. I'd say that they are for intermediate to advanced exercisers. Because they're low impact, you get out of it what you put into it. They're about an hour long with maybe 10 minutes of a cooldown stretch. One annoying thing is that they work one half of the body for the first half of the video followed by the second half which makes it impossible to not do the whole tape so they can't be adapted for a short day. They're very cheaply made. It's like being in a real class. The instructors screw up a little bit but look like they're having a lot of fun. The choreography is really simple.
They are my absolute favorite non-Cathe cardio tapes.