Yeah, height is the biggest drawback. Besides putting it up there, forget it's up there and try to pull into your garage...
Hitch mounts on the other hand, are easier to put the bike on and there's no risk of hitting things with them. Just be sure they are locked well (actually true for either type of mounts) AND they are tied down well too (to keep them from swinging).
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'03SE
BFG AT/KO
Custom fuse panels for electrical mods
Custom backup solution mod (lights/camera/monitor)
Custom switched power outlets (8+ total)
Lots-o-Lights (6 driving lights, 10 total)
Original registration - Sep, '03
Pre-crash post count - ~1100