Depth perception has nothing to do with it. Idiot drivers who sit in the blind spot or tailgate are the issues and believe me there are many of them. I have commercial license so I see it everyday. You pass someone and they stay just off you bumper to keep you from coming over so yes a blind spot is needed, if not needed why are they hot sellers on NEW VEHICLES (and advertised as a SAFETY item)?
Go to echomaster.com and look for the pcam-bs1 for how it looks It shows it cost a little over $100 there. I had upgraded radio speakers also installed so it cost me $250 for everything. Rrnie, I can send you an installed pic but need you to pm me with a good email address. I had it installed on a 2012 Winnebago Aspect, a B+.