Just returned from a quick turn to DC and will add a few comments based on my first use. Overall, this is a very nice bag. I didn't really feel like I could stuff as much stuff as has been said before, and would be a bit pushed to make it more than just a few days with just this bag. In the clothing compartment I was able to get one long sleeve dress shirt and a short sleeve casual shirt, a pair of dress loafers and the usual sundries to make it three days. Stuffed my Kippy bag on that side because I could not stuff into the laptop side. Even with the tension straps, it did want to bulge into the laptop side, making that a bit tighter.
On the laptop side, I had an X1 and Ipad Air, plus I got that Tom Bhin accessory thingy that has two zippered sides. That was nice as I used one side for electronics and cords and the other side for shaving kit stuff. That plus a pair of Bose headphones and the front was pretty much to the point where I had to squeeze to get the zipper closed.
All in all, great bag, but weighed in at 20 pounds loaded like that. It is great for a few days as a single bag, and most definitely will be a fantastic second bag to a 20 inch roller for long trips.