It's so easy. I have a Nissan Xterra and I tilt it down flat to open the back hatch. With one bike on it in the most rearward position, I can tilt the rack back and still open the hatch. The unit is pretty heavy, but built solid. Definitely recommend this.
I resisted the hitch mt for years in favor of roof mounts. When I finally gave in and bought this I wish I had done it sooner. Its Yakima solid and well designed. Keeps the weight and the mud off the roof and on the back. Only disadvantage is you can't open your rear lid (Outback wagon) with the rack in the up position.