I ordered these joysticks after two years of owning KontrolFreek FPS standard concave joysticks. absolutely love it. I've used them on both joysticks on my Scuf Gaming controller in about 5 games and found that my left thumb was beginning to tighten, but my right thumb felt fine after about 20 games. I will continue to use one of these on the right stick and a concave FPS Ultra on the left stick. I noticed a slight increase in sensitivity due to the slight increase in height compared to the concave model. This is exactly what I was looking for. I play COD: Ghosts exclusively and this has definitely helped my gaming skills. Other players are much easier to turn on, especially when I'm playing at 19 sensitivity. I know I will be going up to sensitivity 20 very soon, after getting them I had to drop the sensitivity a few notches to get used to the sensitivity. All in all a great product. Highly recommended for anyone looking for a new edge over their opponents. PS - I use them for every game I play, even racing games.