Well as the one dissenting vote, I like them. I've put a lot more than 300 rds through mine and they are barely hurt. Of course I check them after every few hundred rounds and they last about 1000 tds or so before they start to look ratty/tatty and get replaced. Realistically they probably could go another 500 rds or more, but why bother? Try them, if they don't work in your guns (and some guns don't seem to like them) or you don't like the feel (they change the reel of the recoil slightly) you can always pull them, I agree that some I've seen for sale have been in the "are you sheeting me?!" range, others more reasonably priced.