1 & 2 I think it's good & legit. There is no way that overwatch/admins can catch the aimbot, if you use legit settings and a legit gamestyle. Feel free to join teamspeak and write to me there if you see me, I'll show both rcs and aimbot ingame. Also you can find a few videos at youtube showing the aimbot, or just check the news here on the forums. Jimster improve and tweak the aimbot almost all the time, so it's much better if you see it live, then you know how it looks like in the latest update.
4. 2+ years.