This bag is extremely good value. Larger and much better looking than expected. I’m using it as a seat bag and had to do a little bit of sewing to get it to fit, but they give you a generous number of hooks and straps to play with. It looks really amazing on my black Can-Am Spyder. It actually looks custom-made since the side profile matches the saddle bags (made by Givi). The built-in rain cover is great. One of the best buys I’ve made in a long time. Too soon to talk about durability, but it looks well made.
I've had this thing for about a month, little longer maybe, so I can't speak to its durability over the long term, but it sure seems solid. It's got a pretty over-built feel all around and I don't see it going bad on me for a long time. It's perfect for daily commuting, I routinely carry a pair of shoes, phone charger, pocket stuff, 1l water bottle and can of Monster with me and there's usually still room for a whole change of clothes if I unzip the expansion zipper. Easy to get on and off a standard key-lock sportbike rear seat, nice little movable divider inside to keep stuff from rolling around. I definitely recommend it.
This bag has done over 10k miles with me, but the one thing the bag needs is a one way vent valve so you can compress all the air out of the bag. To make it truly waterproof, and make it store more, you need to be able to vent the air out, like a compression sack. Other than that, awesome bag.
This bag is huge! Strap system works well. Not perfect, but for a universal fit what do you expect.
Conversion to a backpack is possible but suggest making up your own straps and buckles for that. I just carry it like a duffle.