I like porting, brakes, and compensators. They do make the gun louder. They do allow some of the gasses to escape early, slightly reducing velocity. On a rifle, it can be annoying to nearby shooters.
On my XD 4" 9mm, the porting is of the V-10 variety (5 ports cut in a V though the slide), which actually took me years to get used to. The porting created pressure in front of my face, which caused me to blink slightly upon firing. New shooters are a mixed bag as to whether they like this gun or not. However, the results are that it is much easier to keep the gun on target with follow up shots. It is very, very impressive at night, but if you have any light at all (such as a headlamp or gun light), it does not seem to blind you as people suggest. It does blacken the front sight, and so the white dot that is normally there, gets blackened. And I've read fiber optics are a no-go in this configuration. I think a brass or gold dot would be best so you can just wipe it down. An extended ported barrel would not do this, because it is past the front sight, but in my experience, they aren't as efficient in reducing recoil. Probably a screw-on variety is because they can be designed with more surface area for the gasses to push against, but I would mostly only like that on a revolver, because pistols require loctite or the like usually to retain the compensator meaning you have to reapply it after you break the pistol down for cleaning/service.
I also carry a Kahr K9 with an extended ported barrel that is similarly easy to shoot.
On a .22 LR is makes very little difference. I have a 22/45, with a very aggressive compensator/brake screwed on, and it is hard to tell, because .22 LR has so little recoil to begin with. I've never tried it on anything bigger than a 9mm in a handgun, but from what I've heard it can be really nice with .44 magnums on up.
You do have to conscious of how you hold a ported handgun, because there is at the very least, burning hot gunpowder escaping through the ports (hence the fireball). So, a ported handgun need to be properly held away from your face, like you would hold a normal handgun. In addition to this, it is possible for metal fragments to escape porting/compensation/brake that are shaved off from the bullet during firing. I've read on SVI's (a custom 1911/2011 maker--see Heroes) website that you should only shoot jacketed bullets for this reason and keep the ports free of debris. Also, I've blown out on of the cuts of the extended ported barrel that I'd bought for my XD. I didn't really notice it until much later during the shooting session when I showed the barrel to somebody at the range. I am happy that I or no one else were hurt. I sent it back into the company, and got myself a new barrel (threaded this time).
Finally, what other people are saying is correct. Especially with a rifle, efficient brake can be annoying to other shooters. The most efficient type of brake pushes the gun not so much down but forward, such as a fish-gill type break or a cup like the Jerry Miculek brake. Such aggressive brakes will push a "V" back to either side of the shooter, which will actually push against (like a pressure wave or puff) the shooter standing next to you. The brake on a .50 cal is actually straight up dangerous all will tear apart a sandbag, and I would imagine flesh.
For regular sized handguns (9mm, .40, .45 ACP), do make the handgun louder, but handguns are already really loud, so I don't really notice the difference. On a rifle, it can be pretty significant.