Good, but does not meet all that promises
It's big, but lacks a belt for support, which is really needed given the size. Has plenty of attach points which is very handy. It is sturdy, but after only one flight it already shows some spot lacking the first layer of coating (which I think is what makes it waterproof). Is not as waterproof as it promises as I left it outside on a short but heavy rain and the stuff inside wasn't soaked but was definitely wet. Made me think that sticking with my smaller backpack and attaching things outside, and using a bag to cover it for flights, would have been better after all.