I am loving this back pack. I bought it specifically for cycling and it meets my needs pretty well.
The bag itself is very lightweight, the only section of the bag which has structural padding is the back and the straps, the rest of the bag is made of light albeit tough material that doesn't really hold shape, so the bag looks kinda wrinkly if it isn't fully packed, but this is the price you have to pay for a light weight bag. If the bag isn't fully packed there are some adjustable buckle straps that can be shortened to give the bag a more define shape though, and this actually works pretty well. The bad does have good capacity with two compartment; a larger one which has a sleeve for a small laptop (14" and below), and a smaller one with a key fob and some netted partitions.
I waited quite a while before ordering this pack and now that I have I could not be happier. This is the most comfortable day pack I have ever had. It is a simple pack but every need is met without overwhelming the owner with five thousand pockets. Also one thing that makes it super comfortable is the adjustable chest strap. Being a rather short little shorty I have a lot of trouble with chest straps fitting right under my neck so I was super excited to see it actually fit me.
There's plenty of space in the pack and, as previously stated, it does have some pockets but it isn't a ridiculous amount. I also really like the key clip feature on the front inside pocket because no one likes finally getting back to their car after an exhausting hike and having a panic moment when they can't immediately find their keys. I also appreciate the option for a hydration bladder as well as the bottle holders on both sides.
As far as the actual pack construction goes it is very well made and what you would expect from Osprey. The zippers are smooth with large, durable pulls and they are covered by a flap of the exterior material of the pack when closed. The straps and the back of the pack are wonderfully breathable and well padded.
The bottom line is I would totally buy this pack again. A good day pack is essential for any adventurer and this is one of the best ones on the market.