Oh lord. look at the pics... two sets of guide lines?!? (and its pointed UP not down). I mean it costs more than doing it the OEM way and it looks horrible. Plus the way they do the programming bricks the radio from future software updates.
Not really finding any other ways to do this, and suffering from a very sore/stiff neck from being rear-ended a while back, I purchased the 'autospa tech' kit and installed it tonight. I agree that the picture on their web site looks terrible... don't know what's up with that, but the gridlines on mine post-install look great.
And I don't think your comment about 'the way they do programming' is correct at all, as there is NO programming involved with this setup. NONE. They supply a little 'black box'. You unplug the goofy video-LAN connector from the back of the color touch screen and plug it into the 'black box'. Then you plug the 'black box' into the color touch screen. Now the 'black box' is 'intercepting' and usually sending the signal from the head unit straight through to the screen. When you put the car into reverse, the black box knows that because it's looked into the low speed LAN network, and it disconnects the normal 'head' signal and instead sends through the signal coming in on a standard video port that is also on that black box.
There is a set of gridlines always pointing straight back, and a set that turns with the wheels. My very first attempt at backing into a parking spot put me effortlessly straight in and centered. It is pricey at $500, but I'm impressed with the quality of the entire setup, and it works.
If I could still turn my neck around like a normal person, I'm not sure I'd get it, but again, with my neck injury, this thing rocks.