Yes, I used them on my childhood cat when my mother threatened to have him declawed. They work really well, as long as you are able to cut the cat's claws without too much trouble, these are really no different.
Clip the cat's claws and then apply the caps to the nails. If you're worried about furniture, you really only need to do the front paws. Once they are applied, all you need to do is check once a week that they are all still on. The claw grows out and eventually the cap comes off when the outer shell of the claw is shed. Simply clip the claw again, and reapply.
I used the caps for the last 4 years of Peanut's life before he died of old age just shy of 18 and never had a problem with them. It only took him an hour or so before he got used to them.
I would absolutely recommend them, in fact I showed one of my neighbours how to use them when she mentioned declawing, and she has been using them for 2 years.