I am happy with them. I wasn't sure about the rocking at first but it does not seem to be doing any damage to the rack as of yet and it certainly isn't hurting the bike. I don't like fork mounts for a few reasons and the main one is that I travel with so much gear that I don't have room in the car for muddy front wheels especially when I am carrying two bikes. I am usually carrying at least two kayaks on the roof at the same time as the bikes. I have also heard (maybe it's a rumour) but fork mounts can cause some structural damage to the bike if there is enough torque on the forks from bumping up and down rough roads. This does not happen with the upright carriers because the entire bike sways.

Mike