Not really very good for climbing
I bought this a bit over a year ago to use for carrying climbing gear during approaches and occasionally on shorter multipitch routes. What I found was it isn't really well designed for that. It's a bit too tall, so if it's loaded it hits your helmet when you look up (I'm 5'10"). The plastic back plate is so thin that it doesn't really provide any stiffness and really only prevents things from poking you in the back. The compartment in the lid actually is kind of a pain because if you stow a decent amount of stuff up there (keys, wallet, phone, sunscreen, etc.) it makes dealing with the lid kind of a hassle. The description talks about an "Integrated vertical rope carry system", but I haven't been able to figure out what that is. I replaced this pack with a Petzl Bug, which is is clearly designed with climbers in mind.