I bought a move on launch for shooters. Had a few issues with how it worked but could see the obvious gains in accuracy at the cost of camera control. When the sharpshooter was announced I thought it would solve all my issues with FPS control with the move.
The sharpshooter I found was an improvement and preferred using it than just using the move by itself. The increase in accuracy over the dual shock lead to a decrease in camera control, and after a few hours of playing I figured theres advantages and disadvantages to both, why am I going through and re-learning how to play a game with a new control system when I had no issue with the old control system. That and I have to sit in a particular spot on my couch in one position, rather than where ever I want.
I have since sold my Sharpshooter. Kept the move just in case something cool comes along for it, but its just not for me. I can see where people can gain from it, and I appreciate what it does, and it is certainly cool taking players down with it, but it's just not for me.