I have a Thule Helium 3-bike rack, and I love it. It is one of the more expensive racks, but I like its advanced features. It is made from aluminum and is extremely light-weight. This makes it easy to install/un-install, and carry. It has an integrated lock/stabilizer which comes with the rack--it is not a add-on accessory which one must purchase separately. It has an integrated cable lock for the bikes. One can mount/dismount the bikes on the rack very easily, and they are very secure on the rack.