i got the wired frag fx and it plays pretty good, and its handy!
you can hit the buttons easily, it rated up MY k/d rang
its not giving you that a big advantage though, people who are handy with a controller dont really need it...
u will get used to it very fast!!!
i've never regret buying this "machine".
i used to play with a controller, have been doing well with it, but since i own the frag fx i will never play a ego shooter with a controller again ;-)