This rack seems to be nicely made. The 'other' big name version was around 60 pounds, versus about 23 pounds for this rack. A second bike can be added. I lift the front of the X3 into the slot first, lock it down, then lift the back. No stress or strain with the battery removed.
I had it out on the Interstate at 80 mph (Utah Speed Limit) and nothing was happening back there. I think people buy this kind of rack because you don't have any part of the frame touching the rack. It's too easy to scratch things if you set the bike frame on a rack.