From what i've read about the cons. These are just things that happen everywhere, and arnt specific to CCP.
For instance salary. The grass is always greener on the other side, and if you can earn 30-40% more somewhere else, why the hell are you sticking around.
Internal politics and wrong people in wrong places due to friends, i've yet to find the 1st company where this isnt the case.
So i would take the cons very lightly, and the pro's more heavily (because they are disgruntled BUT STILL have positive points!)