I've had the Solid Gray black backpack for a few years and it's really great. You can fit a 15.6 inch laptop in it and have room for lots of other things. It's the same weight as a normal backpack, but it doesn't squish flat. The straps are swappable which is cool for switching up your style. One issue I have with it is people will just walk right into it. Like they weren't paying attention and they smack into it spinning me around and sending them somewhere. It has happened multiple times waiting for the train. I bump it on some doorways too. But bumping this on something still keeps your stuff safe. I really like this backpack. Also it cost me over $300 to get it. So this is a steal.