Why CP ?
The output is really consistent, even in LP, allowing being really good for performances.
The adjustable filling speed allow people to "care about how filling should be done" (specilly with stako bottles), or can be normal speed if you want it to be.
I never had issue (except if the US shop you got it from give you a wrong o-ring, but that has been sorted in 2 seconds).
The thread is strong (I've stop counting how many time my bottle falled and the preset bounce on the floor).
And they have a nice style (choose the color, ....) perfect for paintballers
The other preset I loved was one with a purge (perfect on a mini, that's why I did use it); but I can't remember the brand, it is the brand doing noisy preset (metalic noise).