This beauty has been with me in very wet conditions on the West Highland Way in Scotland. Yes it has gotten a little muddy, but it has kept up! There are the right pockets and the netting is great for stuffing your hat or raincoat.
The size is very versatile. It's big enough for you to actually carry your gear like jetboil compact sleeping bag etc., but it's also small enough to work as a day bag with dry socks, a woollen jumper and some lunch and snacks ☺
When it's only half full the two clips on the front are a little anoying - you unclip one meaning to unclip the other... Not a real issue.
I would like it to come with the build in rain cover as so many Ospreys do, but you can just carry a detached on - just have to remember it ☺