I spend quite a lot of time on the train travelling between home and various workplaces. It's important to me that I can easily carry my electronic and paper work kit in a convenient rucksack that's also big enough for a change of clothes. As I try to walk rather than use the Tube or taxis once I've arrived at the station, the rucksack must also be a comfortable carry.
Bottom line: this is it! The Case Logic 115 takes my 15 inch Assus laptop, my back-up tablet, iPod, camera and accessories with easily enough room for overnight kit. Plenty of pockets for safely stowing kit, and tough looking zips that give me confidence in the rucksack's longevity. And yes, it's very comfortable to carry. I'm very happy with the bag - it's my real travel companion!