Hrm, really seems not too shabby.
As weight goes, I notice with my 'big bag' that the weight of the bag itself becomes considerable: for me, I carry about twelve to fourteen pounds without hurting, , (Still splitting systems between heavy old Canons and Pentax for digital) but after that every set of AA's counts.
My big canvas bag I've dubbed the 'caboose' can be either for carrying heavy, bulky, or as a travel-carryon that can handle this beast of an old laptop, light gear without winders/grips, and some personal effects. The bag itself is not negligible, weightwise, though.
That looks like it could handle a smaller laptop, a full-sized rig, and some etceteras.