I got this bag for a 1000+ km trip from South Vancouver Island to the tip of North Vancouver Island. It might just be one of the best tail bags I have ever had for adventure riding. Waterproof, dust proof, durable and the best part, really easy to put on and take off the bike. The bag didn't move around at all on the bike once pulled down tight. I was even able to rig up the straps to be backpack straps for a 3km hike into the beach to camp (although I would have preferred to ride my bike right to the beach!)
Overall, you just can't go wrong with this for a tail bag. It fit my tent, sleeping bag, spare clothes, food and a few odds and ends.
used this on my quad during deer season. easy to install and it kept all my gear dry. Should work nicely on the motorcycle this summer.