Naturally when you think about hacks, you're going to want to decide how hard you go. If you use the bells and whistles there's always a higher chance of getting caught, but when you go with Chams, it's all about the quality of that particular function.
PA CS Go Chams are as functional as you would expect, with an easy config file embedded into the PA website itself. It has two primary options: Chams for visible, and not visible, with the latter functioning as a wall hack. PA's Chams enable you to change the color of visible and non-visible targets so that you don't look like an absolute cheater when you bang someone through the wall thinking that they were actually visible. For the price, these chams give more options than I've seen with PA's competition, and by the sounds of it PA has a better track record of being undetected.
BUT KEEP IN MIND, being detected doesn't necessarily mean the hack itself has been beaten. Usually it is the player who ousts themselves by being a blatant cheater. Play at your own risk, be smart, try out some chams vs. the CS: ESP/Aim bot/No recoil. If you're experienced, the latter will be a better value, however.