I just bought the Shock Doctor today at my local Dick's Sporting Goods. It's the item mentioned in "rhatten's" above link.
NO ONE should go buy one. It, um, well.....er.....OK, fine, it's sweet.
I took it straight to my NAPA league night and only got a couple of shots in during 2 warm-up games, before having to go play with it for real. Yes, it felt weird. It felt constrictive. It took away some of the feel/touch that was mentioned above. But, I'll be damned if it doesn't keep your wrist straight as an arrow.
I had NO IDEA how much the wrist was the key to your game. Because I constantly kept feeling myself wanting to twist and turn my wrist, yet the Shock Doctor would have none of it. Consequently, my stroke was straight and I was pocketing everything except the occasional low percentage shot.
Actually, I say my stroke was straight. And technically it was. But, as I practiced lagging (lagger's choice session), just moments prior to my match....I noticed my CB was tracking pretty noticeably to the left. I quickly realized my body was in the way of my stroke and I had been hitting "across the CB". I made a subtle adjustment to my stance/body alignment and it ironed most of that out. But, it's food for thought when I can get back to the table.
I ended up beating a lower level player 5-1 in 8B, in what was a race to 4 for him. While he did make me work a bit, only a failed BIH attempt on a "small" side pocket....trying to solve a problem-ball....stood between me and a "Rackless" match. It was a feast or famine attempt, and I went hungry on it, while my opponent got out to taste his only score.
I got home, actually looked at the instructions, and realized that you can adjust/remove some bracing in it. So, now I can't wait to get to the practice table and see if I can get really comfy with this equipment.
Again, I don't need any more competition, so I implore you....do not buy this brace!
P.S. I'm a lefty, so I obviously bought one for that side. But, considering how well it works, I'm seriously thinking about picking up one for my right side, so I can practice off-handed. I'm fairly ambidextrous, but lean towards being a righty, in reverting but pool bad shooting a gun. It's too long of a story for here, but I see the table much more clearly from the right side....and have a nice stroke, but once every few shots or so, my right wrist will just do a crazy spasm-twist and I'll drive the OB into the rail.
I think the Shock Doctor would fix that. I'd LOVE to switch over to being a righty, as I think I could be a better player in the long run.