I really wanted to like this bag. It's great quality at a good price.
But it's a bit too small where it counts.

Other Reviewers here have pointed out the problem, but everything is, of course, dependent upon what you need. Namely, once you insert a laptop into the provided slot, you can fit very little else into the compartment behind it.

There are tons of pockets. And great little zippered slots. Room for all kinds of things -- except in the main cargo area behind the laptop. You can squeeze a shirt and underwear in there, if you really need to carry these in a small carry-on. But if you have a book, or pair of binoculars, or anything thicker than about 3 inches, or that cannot be squashed -- it will be a battle.

Think of this as a minimalist approach to a great business bag. If you use a tablet or small laptop, but don't need to carry a portable printer or much else in the way of bulky items -- great! This is the bag for you. Flat thin books and magazines. A newspaper. Great! A 3-ring binder with lots of research papers? Probably won't fit if anything's in the notebook slot. And I think it's because the handle fills up a lot of the remaining cargo area (as on almost any collapsing-handle design).

The wheels do roll very well on this bag. If you've never used a bag where the wheels roll 360-degrees, you're in for a treat! I find such bags hugely comfortable to use, especially if they can also be tilted for pulling behind you -- which this one can (not all can -- beware the kind where the wheels are encapsulated in protective shroud, a fairly new offering from Samsonite).

I'd say it's ideal for a daily commuter, but not as a travel companion on a long trip. Anybody who claims this won't fit in an overhead bin must be trying to stash it upright, sitting on the wheels. Which is a bit of a "different" way to stash them that I've never attempted. It will easily lay down and fit there in any orientation.