I just got an R35 and a US-20. And I have a US-5 on the way thanks to the Kriega rebate. Wonderful bags so far!
I do wish there was another mounting option if you're using a rack. Something a bit more permanent looking. The webbing loops are OK, but they ended up being a bit too long for my use. And when the bag is off the bike, the loops hang down pretty far and flop around.
So I ended up making my own solution, at least for now. Seems to work OK. This is an SW-Motech rack on an F800GS.
Thanks again for making such a wonderful product. There was no second choice.