Been searching for weeks to find a bag for my gear that I have to carry back and forth for my job as sys admin for two locations. I ordered this one.
Cost about $40 with shipping and I'm amazed that I could get everything in it and still squeeze it into my trunk on the bike.
I have my macbook 13", which fits easily in the well padded laptop compartment, (enough room for a wider laptop), the power supply, mouse, another small bag with a LaCie brick external usb drive and power supply and cables, power screwdriver, ethernet cable crimp tool and rj45 connectors, a CD case that's a zip up 1x2 cd per page full of cd's, various cables, and a bottle of aspirin, all fit inside the backpack. Very well made and nice smooth working zippers. Has a padded shoulder strap, and tucked inside the back side inside a zippered compartment are padded backpack straps, one with a cell phone bag attached. Well worth the money. And if I have to use the trunk for extra stuff, I can wear the backpack and it rests just perfectly on the passenger seat so it's not bearing down on my shoulders while I ride.
If you don't have a trunk, but need to carry a laptop, this bag really is a good one.