Speaking personally, I've had issues with having no internet for days or even weeks on end on occasion, and have had no issues using Steam or accessing any of my games during that time. I'm not discounting that others have experienced problems, but from my perspective, it works just fine. And you don't even have to run Steam in offline mode to use it offline, providing it's already running and had logged in when internet access was possible.
Last edited by Jito463; 22/06/14 06:14 PM.