Just installed the BD unit on my truck last weekend, and test drove it yesterday (unloaded) for the first time.
As far as the product quality goes, it is perfect. It fits perfect, easy to install, looks great, and is well engineered. Keep in mind my truck is a 4x2, and I definitely could feel more precise steering control, but I would not say it knocked my socks off. Perhaps it makes more of a difference on a 4x4?. I think it will help most when towing, because my truck wanders quite a bit.
Anyway, I would highly recommend it nonetheless.