I chose the 4 bike rack, as it was wider to accomodate my two bikes. It gets them further from the travel trailer side, so they don't bump into it. Assembly was quick and easy, appears the product is powder coated, which I would think should wear well. Right after I installed the unit, I opened up the 08' camping season by going about 1 hour away. The bikes rode well, where they fitted into the wheel wells. The upright stanchions are handy to help stablize each bike for tying down. I did realize that take a small (1" wide") rachet nylon strap and tying it off from the bike that rides outside and hooking it to the bumper. This really "snugged" up both bikes for travel. Bikes are easily lifted onto the racks, as well as unloaded, not a high lifting height.
I know the value of this was good from Overstock, as I compared to other suppliers, as well the smooth service I received from Overstock. A "Thumbs Up" recommendation.