I purchased this to protect my laptop and carry around my books about a month ago. I must say, even with a 15.6" notebook, there is plenty of room for all my stuff. The only thing this bag is missing is a water bottle holder, I tend to just stick it in the middle inner pocket. I prefer the shoulder strap so I never use the handle on the back but the stitching seems adequate for most uses. Not Rowsdower adequate, but it would probably serve the purposes of Bob Johnson or Blast Hardcheese, whom I put my faith in. Remember, this is a notebook bag, so I try to not put anything too heavy or large in the bag. Bowling balls and/or cinder blocks probably wouldn't work. Yes the notebook carrying part is padded, but why take an unnecessary chance? It still fits my notebook/mouse/power adapter, paper notebook, various loose papers, ipod touch, and 2 of my college text books with ease (Think giant law tomes or organic chemistry, not... well I can't think of anything because all I have taken are law or science classes... nerd alert).
The bag itself is nice quality. The canvas is not as yellow as it looks does in the picture and the spots for the velcro id holder above the black straps don't look as weird either. There are two strips of black padding on the back, towards the bottom, which actually makes a difference when I walk as the bag tends to stay against my legs more instead of bouncing around (well, stays as much as a messenger bag will). The underside of the canvas is a velour like quality; I find it ero... wait, wrong review. The underside is a fancy water resistant plastic. However, I probably would not take this out in heavy rain, unless fully loaded, as the sides where the shoulder strap clips on tend to stick out a little from under the flap. When fully loaded the sides don't flex out. I put a trashbag over it when it rains. When people ask me what I'm doing I act all offended and ask them why they don't like my bags and the cord I use in lieu of a belt.
There are a lot of pockets. On the outside there is a pocket which is against your body when you wear the shoulder strap, I tend to not use this. If anything, I would probably only put loose paper in there. The flap has a zippered mesh pocket on the underside, perfect for my power adapter and usb devices. A 7 pencil holder on the front, the black rectangle on the picture is a little slot to keep them in so you can actually bring writing devices which do not have clips. There's an open pocket on the right side about the width of an ipod touch and a little taller and deeper, I wish there was a similar pocket on the left side. A pocket the size of the black strap directly behind it (about 6" across guestimating) with a slight velcro enclosure. Another pocket the length of the bag with a slight velcro enclosure. Inside the bag are three pockets: a thin one good for one of those 5 subject notebooks plus a little extra, another pocket which can fit two large text books and a supplement, and the padded notebook section which rests against you. The notebook section has a velcro strap on the top which you can use to tighten the pocket if you don't use a 16" or 15.6" notebook. The pockets are all a good size, and I can bring pretty much anything I want and not have to dig through the bag to find it.
One of the reason I got this is because I'm decently tall (6'2") with pretty broad shoulders and a lot of other bags did not have the shoulder strap length or width (so it doesn't ride off me) I look for. I like the middle of the bag to rest against my hips... <raise eyebrow> ladies? This has a very long shoulder strap which does the job nicely, with enough to room to spare for a much taller person; I only have the strap loosened slightly below half-way. I tried pretty much every bag at a couple of computer stores and this was the only one that felt right, like when you try on a pair of running shoes. The shoulder strap seems sturdy, however, make sure it is not twisted when you pick the bag up because the strap-clips will detach from the bag. This really isn't a problem with me because twisted shoulder straps really annoy me when I walk, but I lifted it up off the table one time and the shoulder straps just popped off (the bag stayed on the table so nothing was damaged). With the shoulder straps straight, I put a few heavy books in and swung the bag around violently for a while. It did not detact and seemed very solid, so I'm not really worried about a repeat.
Overall I like this bag, it doesn't really scream "COMPUTER BAG... STEAL ME" when I wear it around and lets all the cool kids know that "Yes... I have a bag. So you know... yeah." I would give this 5 out of 5 if it wasn't for the clip coming off that one time, and the sides sticking out slightly further than the flap when it isn't fully loaded.