I don't know which model I have, as I've had it for a couple of years now. Only indication on it is "D Fit", but the bag you are looking at looks to be similar is size and shape, and mine can handle a laptop and books in the large (closest to your back) compartment. On my bag, that compartment is about 11x19. with the depth varying. The bag is flexible, so the width can be 'stretched' if need be. Mine has two zippered compartments, with the area in between them being an always open reach in compartment. I put paperbacks I'm reading in there. Oh, and there is a soft lined cell phone compartment, and pockets on the sides: one mesh and one zippered, where I keep hex wrenches and such. Front compartment has smaller places for wallets, pen and pencil, etc.

The bag works great for my commute, and I love having the water always right there as I'm riding. Looking at the photo, I suspect the Alpine is pretty similar. I originally got mine for search and rescue, but use it as all purpose carry all when I go to work, whether I'm riding or driving.