I bought this during the summer sale the other day and it says it uses Valve's Anti-Cheat system and I was simply curious if you can be banned on Steam and have VAC bans on your account from using the trainer?
I think Liara is right, I use steam for most of my gaming purposes and haven't had a problem yet. Though, I'd be smart not to use it on anything multiplayer related.
I have been using trainers on Steam games for years (single player only) and have not been VAC banned. Granted, there is no way I can provide a guarantee, it seems likely that you will be fine.
--------------------------------------------------------------------------- -Mistakes- Perhaps your sole purpose in life is to serve as an example to others.