It is good to be light and large, but if there are few things to put in it, the shape gets tangled.
Because it is used as a keyhole, it is saved if the fastener hole is a little big. (It can not be helped)
I put a big baggage, so the size was satisfying. Also, when not in use there was also a storage bag and it was good. If possible, I think that it is better to be fitted with a shoulder belt so that it can withstand heavy loads.