I really like my Bonneville. This past weekend I did a little trip down to Southern Utah on it -- as always it was a blast in the canyons and handles the stretches between with ease. My only real complaint is that the fuel tank is a bit small for some of the places I go. I can get about 160 miles before I have to walk (so I figure closer to 140ish safely). As a canyon carver that's plenty, but I get into some remote places down south where that's a real problem.
Fuel range aside, I'm very happy with the bike. I'll probably have it for a couple more years before it's time to try something else. Besides, it's a nice companion to my Bugeye. The two seem to fit together nicely.