after a month with a standard hanging-style hitch-mount rack, we upgraded to this rack with the rails. it works much better for road and mtn bikes. it is stabile and does not rattle. the old rack did not accomodate my girlfriend's full-suspension bike. she is 5'3" and i am 6'2" and this works great. she loves it because it is easy to load and use. the two minor complaints are that you have to use a wrench to remove the rack from the hitch (though it is very secure), and the ratchet straps need to be secured well when not in use or it looks like they may come off.