I used to use a Mongoose for many years and forced myself to not use it.  Went without it for a couple years but I noticed that I have a hard time being consistent with my release.  I would end up moving my wrist and turning the ball and what not.  I recently went back to the brace and have been much more consistent and my average went up.  Because I wasn't doing funky wrist movements, my revs went up and the ball roll was more consistent.  I don't have weak wrists, just can't stop it from moving around. 
Yes, in Asian.   

Xrayjay,

Can you tell me how to strengthen your wrist?  I can only bowl on one league because of it.  My weak wrist is prolly from years of machine operating.  Now I'm a teacher 

Be as specific as possible.

Cav

First, I bowled less games overall, got plenty rest. A friend of mine is a PT and she gave me some exercises to do. Here's a link similar to what she showed me.

http://www.toc.md/exercises_wristhand.htm

For wrist strength exercises I did wrist rolls..... You've probably seen this technique before. Basically, all you need: a stick (like a broom stick 1.5" thick or thicker) about 1.5 ft long, a strong thin rope, and 5lb weight. Tie the weight with the rope at one end and tie the other end to the center of the stick.

Then, just like engaging the throttle on a motorcycle, roll the weight all the way up and then all the way down with arms extended slightly bent, palm side down. and pref in a "horse/sumo" stance.  Focus on technique and importantly focus on your core. I'm pretty sure someone post on Youtube on how to do this exercise.

They don't seem to be as popular in my area as they used to be.