For $200 the plug and play module is totally worth it and works perfectly. The cam is a cheap one that you can get off ebay for $30. It works nicely though. I hope it lasts a long time otherwise I'll be buying a more expensive one. So far it works well outside and in a low lit garage. Do you guys have yours pointed so you see the bumper like I do or do you have it pointing back?

 

Mine is pointed up a little higher so I can't see my bumper. If I had guide lines like yours, I'd probably put a measuring tape on the ground and make sure the marks are accurate and align it like that. Then it won't matter if you see the bumper or not. You'd know the distance to obstacles.