Okay, okay, okay... I have to download #4. I like 3 a lot but it's too short.
For anyone who is looking to download these workouts, keep in mind that they have a good 5 minute warm up, and cool down, and another 3 minute section for cool down PLUS a stretch. So, when it's says there's 45 minutes, it's actually 30 minutes of work. I tend to skip the second cool down - my hr is already in the zone after the first one. Just an FYI. I'll download CC4 on Monday.
I did this on an elliptical - and I usually cannot get my hr up - today I had it at 161 which is very high for me (I hit that on the Kick Max Blasts, but hardly ever any other time). And it's fun. I think what makes these so fun is that you can do the same workout on a bike, a treadmill and an elliptical and they all feel completely different.