I used them for years in the 1990s. People advise U not to have them on the gun when using it for carry - theoritically, it can cause the slide to short stroke or it can wear out if ya do a lot of shooting, and possibly fragment into the gun and jam.
Those are the stories the haters of the shok buffs will tell ya.
I used them for years. And, I replaced them when they developed wear. I had a full length guiderod, so it would have been a pain to take them in and out depending on if I was range shooting or carrying the gun. I left them in all the time.
I never had a problem. When putting them in with a new recoil spring, it did make it harder to pull the slide back to make the slide stop activate. But after shooting some rounds thru the gun, the recoil spring compresses a bit, and U are fine.
While I KNOW U will get some people that will post after me, stating that U don't need them. I suppose if I had a aluminum framed 1911, I'd use them too - assuming the gun functions fine with one installed.