I've owned a number of racks over the years and this is by far the easiest to use, the least stressful on the bikes, and the most flexible with respect to frame style, wheel size, etc. I was easily able to fit a fat bike and full suspension MTB bike together.
The rack also has a cool built-in bike repair stand which has come in useful on more than one occasion.
The only problem I've had with it was when my wife ran the car through the car wash the day before we were leaving for a cycling trip and the temperature overnight was well below freezing. I had to get out a hair dryer to warm up the front wheel clamps so they would extend.
Forget all those $100 modern wall-mounted racks that just look pretty. The Feedback Velo Wall Rad 2D is built to last. Doesn't fell flimsy and I can trust it to hold my $9k to $12k bikes 8-feet off the ground. The soft rubber cradles are designed not to pinch external brake cabling which is AWESOME! Two thumbs up... way up!
In theory the build it in the box sounded like a great idea. The one I received however had a major flow in one small piece which made it impossible to instal in box. It required me to mount it to the hitch and then loosen every bolt so I could install the tray rods and subsequent back plate. The product its self is easy to use for the most part, secures the bike snuggly and is very sleek, slim and lighter then the Thule. However, if it wasn't for the astronomical return fee I would have returned it and purchased another Thule XTR.