As someone who was very afraid of having to back into a crowded supercharger stall in public before buying my car, I can say now that what he did was cake. I actually prefer to back my car in now since then I don't have to worry about the front bumper on high curbs.
The combo of the giant screen and the tracking lines makes it pretty easy. I have my reverse setting on my side mirrors set so that I can see the side of my car (for checking corners) and I am golden. I started by backing into spaces with no cars adjacent so I could learn to trust the tracking lines. Now, I would feel comfortable backing into the end supercharger at Burbank which is around a corner and there is no way to get a straight shot at. (When I first test drove, it was at Burbank which was packed and I thought "oh, no, I can't BACK into a supercharger in these conditions!")
As my husband reminds be often, I am not some super skilled driver with excellent depth perception or anything, so if I can do it, anyone can.