I purchased this bag for carrying my Mac Book Pro 15". The internal sleeve for the laptop is a bit snug, which is perfect. I don't want my laptop rattling around. It is nicely padded as well. I had my shoulder strap slip off my shoulder when leaning over to pick something up. The bag landed on the concrete, and I was pleased to find the bag had protected my laptop, and there were no dents, or scratches.
My only complaint is that it lacks a handle on the top of the bag. When the bag is loaded, it's difficult to pick up. Grabbing the long shoulder strap is awkward.