This was my first time on a vibration plate. I think I bought the right one the first time. I like the ability of the 4D and the ability to Crank it up to 60. No matter what program I put it on I crank it up to 60. Occasionally I feel a little sore but not too bad. I am 3 years retired from UPS so I am in good shape. This will be part of my plan to stay in shape.