Why would you even want one? The report is part of the fun.
Actually they are a very valuable tool for teaching new shooters. I have a couple of 22LR suppressors and several guns that they can be mounted on. Having somebody brand new to the sport, it allows you to teach them with basically no noise and no recoil. It also allows us not to have to wear hearing protection for the beginning training so everything can be heard from both our perspectives. Having someone start off without worrying about flinching is a much faster road to good shooting.
Then of course there is the fact that they are just plain fun.