I bought the Tuact Aimon PS controller and so far it's pretty sweet.
It takes some getting used to and tweaking but I love it so far.
The main advantage with the mouse controller is accuracy, I'm able to have better control on the speed and precision of my aim using the mouse. Moving around and doing certain things (such as melee and/or crouch) takes getting used to since it's a bit different.
One downside I found so far is that the triangle, square, X and O buttons are not very sensitive for being placed on the side of the mouse, they have pressure sensitivity (but what games are really using that anyways...along with six-axis), so I really have to press further down than I would with the original Dualshock controller. That's too bad cuz the idea with the pc gaming style with a mouse is the extreme responsiveness of the controls. Even adjusting the button sensitivity doesn't do much since the physical distance from the button registering fully is a bit much for what it should be, but I've adjusted (it just makes changing to explosives tricky).
Overall, I've noticed a much greater increase in my accuracy since I'm not overshooting my aim anymore like I did with pressing the right anolog stick too hard back and forth. Definitely makes sniping SO much more fun haha.
I bought it for $80 U.S. and I'm happy with it.
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PSN ID: ufwhoa