The
SpeedFreek fits on both original 360 controllers and original PS3 controllers, but if you get really aggressive and push on them a whole lot, it is possible to start to dislodge them from the analog stick. Mind you, I noticed this when using the
SpeedFreek with my thumb up high on the top, which is not really the intended usage, and, even so, the
SpeedFreek didn't come
off the analog stick, but merely slipped a little bit to the side.
One thing that I noticed about the SpeedFreek is that if you place them on both analog sticks of a PS3 controller, they can come into contact with each other. Quite frankly, I find the SpeedFreek to really only be desirable on the stick used for steering in a racing game, so this probably won't be a problem for most people/games. I, personally, do use a driving method that would end up in the positions that would cause the SpeedFreeks to hit each other, although doing so might be rare. I find that in games that allow me to use the right analog stick to control accelleration, I can control the car better by either pointing the accelerator in the direction I want the car to go (along with the steering stick), or to "mirror" the steering stick, meaning that if I'm taking a tight right (with the left stick), then I have the gas almost completely off (while pressing straight left - the left and right aspects of the stick aren't read when forward and backward are controlling gas/reverse). However, by mirroring the steering stick, the fuel is reduced as the turn gets tighter and is increased as you straighten out of the turn. Like I said, it's not likely to be a big problem, but it can happen.
The only other drawback, really, is that they are a bit weird looking. If you're a gamer that's more into fashion than performance, you might not want to mess with the SpeedFreek. Also, they're small and, if removed from the controller, could be easy to lose. This could be remedied a bit if they were hot pink or safety orange, instead of a non-descript and easy to lose black, but then the fashionistas wouldn't be able to game in the same room, so I guess you have to draw the line somewhere.
If you're looking for a way to clean up your driving skills and get more precise control to beat that Drift race you're stuck on or to keep from slamming into the wall in that turn, you might want to pick up a pair of SpeedFreeks, because the fashion police can't ticket you if they can't catch you.