I travel outside of the country for weeks at a time and this backpack has been awesome.  I've been using the older model for about 6 years, but it had a flaw where the strap meets the bag at the top, that's fixed in this version so I have no complaints.  Compact, easy to carry and lots of storage space.

I did have to cut the top of the laptop sleeve, because it was a little to small for my laptop, but it's just some elastic material and didn't affect the bag at all.