I hiked through parts of southern China with this. Though it rained pretty much every day, and I scraped the pack on trees and a few cave ceilings and walls, it remained scratchless and leakless. It has lots of storage space (my 13" laptop fit just fine, but I worry about a 17" one fitting: there's plenty of screen width to spare in the compartment, but not much height, if that makes any sense). Its narrow shape felt better on my back than wider packs I've tried, and enabled me to be more maneuverable through tight spaces (e.g., the cave as well as airports and train stations).
I have two complaints: because the main compartment is tall, and loads from the top, stuff you put in first may be difficult to get to in a hurry. I had to be careful to prioritize my packing. Also, I somehow pulled off the strap holding the male end of the quick-release buckle on the chest belt.