Received mine today and like with any controller it will take some time to getting used too.
As I normally play FPS games I can only base my first impressions on that. Using the tactical button layout on COD:
Good
A,B,X,Y buttons are fantastic
D-Pad buttons are soft to press and feel great.
Tension adjusters work very well.
Re-mapping does what it is supposed to do.
I like the triggers, I use the M14 semi-auto rifle and there is a shorter throw to click and thus fire the weapon.
Bad
There is too much travel on the Right Stick to go prone. I think this is due to the raised thumb stick similar to FPS Freaks. When I gently press on the right stick, it feels like their is a click but it is not. It is just some resistance and I have to press harder, therefore making the stick travel further down until I get a click to go prone.
There were deadzones. (Using the extreme sensitivity mod solved it)
The Multi Function and bumper buttons are too close together in order to use them properly.
The Multi Function and bumper buttons are not as good as the A,B,X,Y buttons. There is too much travel in order to get a click thus performing any action is slow and cumbersome.
The start and select buttons are in a bad position, (I never thought that would bother me until now)