I own
this one. I kind of like it. The tab and shift keys are small and hard to find but the plethora of buttons convenient for the thumb kind of makes up for that. The two games I have been playing with it do not have the shift to run control style. Ergonomically it allows my hands to be closer together and my elbows to be in a better position. It is just a gimmicky toy. It will not take you up a notch or anything. For a few bucks it was fun to play with but then I like to play with different key input strategies.