Have any of you [URL='http://www.amazon.com/Soft-Claws-Cats-System-Medium/dp/B0006343W2/ref=sr_1_2?ie=UTF8&qid=1355697324&sr=8-2&keywords=soft+claws']tried these things[/URL]? My roommate wants me to get some for our cats, as they have a tendency to scratch us up, but I'm not sure if they're the best things to give them. I admit they are better than declawing, but do they stay on? Do they annoy or harm the cat?