We've used the Clean Shopper and it worked great. It was easy to clean and use and put on shopping cart. The only challenging thing is finding the holes where the belt goes thru. We used ours quite a bit, you can even use them when eating out at restaurants, in the highchair at restaurants.
The only criticism I have that it is a little difficult findin the holes to put the belt in, the holes are a little small. This is very minor. I haven't use the proper shopper or any other ones. It has held up well also. I recommend it, as it is peace of mind knowing they won't get their mouth on things they shouldn't be getting them on and keeping them away from germs.