From the reviews on ToyotaNation it sounds like it does exactly what it clams to. I think this is the thread you are talking about.
http://www.toyotanation.com/forum/323-1 ... ottle.html
It's nice that it's adjustable. The ones I was looking at several years ago, had static numbers build in to a module.
I've been happy with the throttle mapping in my car, so this product isn't for me.
Dave532 wrote:The throttle controller removes the delay (depending on what setting you are using) which results in quicker acceleration.
Please know that this product will not reduce you're 0-60 times. Mashing your foot to the floor with this product vs without will have the same result, Wide Open Throttle.