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This is one of those thing it’s best to save (lots of) money and stick with the basic ones. The springs in this thing is clicking and smacking away through the movements and makes for a not smooth roll. The grips are meh at best. I wish I still had my old school simple one that I had for 20 years that I payed less than $10 for. The things that make this different than the simple design are the things that take away from the workout for me. More money for less of a workout.
This product is excellent for beginner and intermediate users. Advanced users may benefit a bit more from the non-spring- loaded models that do not provide a mechanical assist, such as the 'sport' version.