I just took this pack on a trip to Chile. It was big enough to carry everything I took, and just the right size for a carry-on bag on a plane. I did a day-long trek up an active volcano in Pucon, and the Wisp performed wonderfully. It would have been nice to have a hydration bladder for it (has a pouch for one, but doesn't come with), and I would highly recommend getting one with this backpack. I feel the pouch/flap on the back could have been designed a little better, but besides that, I have no real complaints. It's very comfortable and very waterproof, and looks damn spiffy to boot.