I've just started it... did burn 1 and 2 thus far.
I think I got a big workout, to be honest. It's not cardio, and yes, you do have to switch up... but if you're not feeling anything you probably aren't using big enough weights. The next morning I'm all sorts of sore (good sore ^_^ )
I'm quite new to the whole weight thing, and I only have 2, 3 and 5kg dumbbells, but those seemed more than adequate for the workout at the moment. I used some waterbottles (1.5l = 1.5kg) for burn 1 but discovered that they weren't big enough so I took a chance and upped the weights for burn 2. The 5kg kick my butt on the rows, etc... though I hope to need to add to it soon (that's what's supposed to happen).
Yes, it's a bit annoying to keep switching, but I just lay them out like the people using dumbbells do and it's not much of a bother ^_^
I ordered a set of resistance bands since the dumbbells are on loan from a friend (the 2 and 5kg ones, at least) and I'd hate to keep asking him for more.
| current weight: 153.0