I think they're great and put them on both of my Dutch Stars. With that said, you REALLY need to check your coach. On certain models, the pads won't fit the back jacks.
You need to measure the size of the front pads and rear pads, making sure that there is about 3" of clearance around the rear jack pad in the up position so that the pad doesn't hit the frame when it's retracted. I know some of the 43' Dutch Stars the jack pads were too large and SnapPad doesn't have a pad for them.
Here is a link to SnapPad, they have a place where you plug in your rig, and it tells you what pad you need, but I would still measure to be sure. Lastly, once you find the pad size, Amazon sells them. The kit that usually fits is teh Highway Pad kit.
https://rvsnappad.com/