BO3 was fan-****ing-tastic for the 2 days before I was banned. Cannot recommend because of the speed of which I received the ban and the fashion I used it.
CS:GO working great, no ban, no bugs.
My 2 cents is be careful. Aimbots will pretty much get you instant detected even if you are using it to slightly tweak your aim, which is how I used it. I would aim at the person, get extremely close the them, if not on them, and use the smooth aim to fix any small error.
I do not think it is SystemCheat's fault I got banned, but rather a lack of warning. I would have been so much more careful if I knew how easy it was to be banned in CoD. I was still being adequately careful, which is why I'm partially confused.