I have all three DVDs in this series and love how challenging they all are. This upper body one one is the most difficult of all three in my opinion, or I guess I wasn't as strong as I thought! By sticking to it using the modifications, I am amazing myself at how quickly I'm building strength, as I was thinking I'd never come close to executing these difficult exercises. I realize now how important her coaching is which teaches you how to develop the strength, and I glean a new understanding of what she saying with every session. Focus is paramount as it is with the other 2 DVDs.I'm soaked by the end of the workout from the sheer exertion of it. Make sure to modify at first and to keep your weight out of the shoulder as she says or risk injury. This series is blowing me away.