I own a V3r and it has worked great for me, for the most part.
The only time I had problems with it was when I tried to run it on only 4 cells(4.8v) in my micro. The manual says that it will work with this setup, but it wont!!!
Everytime I tried to set it, it would reverse the throttle(forward was backward, backward was forward) and even reversing the throttle on my radio didn't change it.
When I went to using 6 cells(7.2v) in my micro it worked like a charm. I now use it in my F201 with 6 cells and a 19t motor and it works great.
You didn't say what situation you were using yours in, so I don't know if this helps....