I have one. It is a tight fit and does get close to the belt, but not dangerously so. Just snug it as tight as you can and make sure the loops are positioned in the best possible spots (i.e. away from the belt) and you're good to go. One warning: they don't hold a great deal, so if you looking to haul more than a pair of gloves, a bottle of water and a paperback book, you might want to look at other options.
( Used to have: )
'08 Vulcan 900 Custom:
*Passion Red *Mustang One-Piece Vintage Seat
*Hard-Krome 2.5" Strippers with Smartpartz Hard Kore Baffles
*Cobra Short Sissybar, Pad & Insert *Leatherworks 312 Chopper Bag *Small/Med. Windshield