By the time you have a brace on each hand, well, there's a masturbation joke in there, but I'll leave it alone
The braces help me sleep. Over time, I slowly clench my fingers into a fist. At night, my fists end up by my side. During the course of the night, I get in to some uncomfortable positions. I've actually created a yoga position I call "Fat man sleeping on hand."
The braces keep my fingers from clenching and have definitely improved my quality of sleep.
For anyone interested, the cheapest I could find were here.