I got one too!
Thanks, SuperJim, for this post, it is what led me to buy one too and I'm glad I did!
I spent a looong time poking around trying to find something that fit, was big enough, and sort of matched the look of the bike - this one checked all three boxes for me.
I originally mounted it with the passenger seat and hand rails still on (easier to mount by running the included straps through the hand rails). Eventually I removed the seat and rails, clipping the D rings underneath the bag to bolts I ran through the fender holes (where the handrails would normally mount).
Still looking for an improvement on the mounting though - haven't been crazy about how I did it (doesn't snug down like I would like it to).