AVAILABLE POCKETS & OTHER FEATURES
There is a variety of pockets as you would expect:
**** Front vertical
**** Middle: This is the largest
**** Top small
**** Back, computer
**** Side drink
There was a handle on top.  At first I didn't realize it was there as it was so tightly integrated.
Two shoulder straps with a sternum strap

Front vertical pocket: Surprisingly roomy. It measured at 10W X 19H.  You could put a pair of shoes in here. Or a towel. Depth will encroach on the middle pocket.
Two side drink pockets hold a Nalge bottle base nicely and the tuck out of the way elastic straps that have nice tabs to grip with, hold the tops of these drink bottles well.  They do not go over the body of the bottle.
Back Computer pocket has a section for a laptop (10.5W x 16H, your typical 15 laptop) and a sleeve for a pad (10 x 12)
Middle pocket is the largest (12W x 20H x 5D) and can hold quite a bit of stuff.
In this there are two zippered pockets, one toward back at 10W x 7D. One in the front and open mesh (10W x 5D)  I used the open mesh one for connectors. In that front section there are some loops ostensibly for pens. There are 6 above one another for a total of 12. Loops were so large, not so much for pens but maybe cords looped in. Pens would not stay.
There is also a zippered pocket on top (9W X 7H) toward the front that is advertised to hold sunglasses as it is padded. I found it a great spot for a wallet, cell phone and important stuff like keys.

MATERIAL
This backpack has a rough black surface. Not shiny like most ballistic nylon ones.  The one negative is that it holds pet hair like crazy.  The zippers all have a plastic lining, I assume to make them waterproof, but on first use mostly served to make them hard to open.  Some of the zippers (like the computer compartment and the small compartment on the top and front), have loops that the zipper tab can slide into, to keep the zipper from working open (or being easy for someone to open it without you knowing).  I liked that feature.  The main compartment does not as you have two zippers that meet. This makes this one handy when you shove it under the seat in front of you, to access your stuff.
The straps have a sternum snap so, you can be sure the straps don't slip off. I had to use this feature because the straps did have that tendency.  One time I somehow misconnected the sternum strap and it was a fight to get it undone.  Since this backpack is quite sturdy with strong material and such, I think it runs on the heavy side at 2.5 pounds.  My other backpack a Case Logic comes in at 1.15 pounds, mind you that one is not weather proof.

USAGE
My first usage was on a vacation trip. I knew I was going to be loaded down with a checked bag and a carry on, so my hands needed to be free and my stuff (like wallet, cell phone and keys) had to be secure & accessible.  I used the laptop bag as a means of stashing my purse, but still having room to carry stuff. My fairly large purse sat in the bottom of the laptop bag easily.  I used the top pocket as my important item spot (wallet, cell phone and keys were put here). The laptop and ipad in the computer pocket.  The wires for everything (ipad, cell phone, fitbit)  in the zippered pouch in the middle front except my macbook charger, that was huge so was on the bottom with the purse, along with my mouse. In the flat zippered pocket in the back I had all the paperwork, maps and documentation. Emergency chocolate (yes that is a real thing) was in the front pocket.
I could put the back under the seat in front of me, no problem.  When I needed to grab it, I would use the top handle.
The one thing, this bag lacked was the typical mix of pockets in the middle section.  My inexpensive case logic had a bunch of them and I could organize pens, post-its, a brush.  Odds and ends.  A few more pockets would have been nice in this section..