These things are great! Use any length of Kontrolfreek's and your game will show noticeable improvement in handling of both aim and motion. In particular, this pack is great because it has 2 (two) pairs: Short/convex in green, and high/concave in black. I, as most (but not all) gamers tend to do when using Kontrolfreek's is to place a "short" on the left thumbstick (motion), and a long one on the right thumbstick (aiming). This pack seems to be the best introduction to new Kontrolfreek users and those who are less interested in Feel vs. Function. There are several different versions for feel and customization. Until you know what you want, this is the perfect point to start.