Construction: This bag is durable because of the canvas weight and quality stiching. The buckle is a nice style, and I don't think anything will fall out of the big pouch because if you have things that tiny in the bag, they probably don't belong loose in the big section anyway. I'm not a fan of the velcro on the small compartments since velcro will wear out long before the bag itself. It's a lot easier to hand sew buttons back on than a new velcro patch.

Usage: I will eventually use this bag for a phone, tablet, notebook and a kindle. It would not fit a 14 or 15 inch basic laptop, though a netbook would have plenty of room. At the moment, I use this as a bathroom bag on a base in Afghanistan. I like the thick fabric for keeping the thick dust out of my stuff, and I'd feel comfortable washing this if I had to.

Additional Notes: I wouldn't recommend using this for an ammo bag. The small pouches are too small for most types of ammo and the large pouch is too big. I think of it as a "man purse", though I wouldn't say that around other infantrymen.