Selecting thumb grip is probably a matter of personal preference. I have tried this type on my PS4 controller, as well as another type that has less dots (only on the rim). Maybe my thumbs are too sensitive but I find them rather ticklish. I am now using a type with a paw pattern on all my controllers (PS4, PS3, Xbox 360, Vita), works well for me.
If you are getting the tall type of thumb grips (Skill co has some, kontrol freek also), be aware of how it changes your game play. Essentially, with a taller stick, it reduces the sensitivity of the stick. Basically you have to move your thumb a longer distance to achieve the same angle as the naked stick. Depending on the game, this may or may not be noticeable. You may need to adjust the sensitivity setting in-game, if the option is there. Or get used to it.