Mine is bar mounted, I've been pondering the Iron Aces mount for awhile.
The biggest challenge I have is not the GPS itself, but the XM receiver. I swap the Zumo and the puck between two bikes, and I've yet to find a good place to mount it. I have Velcro on the XM puck, and right now I stick it on the inner fairing above the radio. It works, but looks like hell and is not completely level. I tried a second Ram mount on the right bar, looked even worse...
Curious where other folks are putting their puck. Has to be quick disconnect so I can move it from bike to bike without major surgery.
I hate that motorcycle they make me ride. I'm here to tell you there ain't nothing in the world I hate worse than that elephant under my ass.
Officer John Wintergreen reference his Electra Glide.
-Electra Glide in Blue, 1973-