I have the Weather Techs on the front only and I think they are great. The design of the ones that use the 3M tape did not seem very clever to me. Why would I want to stick tape on my paint surface if I don't need to.
Seriously, if you are serious about the vent shades, I think these are the best looking ones of the bunch. They are a bit tricky to install but if you take your time, you should have no trouble. That said, the edge that slides up into the door rubber is pretty sharp so be careful. I seem to recall drawing a little blood on a finger sliding mine in.
I cannot comment on how the shades look in the back window since i have suicide doors in the back and not the full double cab.
If you really want some pictures, I can try to post some later this week but I am hard pressed to see how you would be disappointed. I think these look much better than the others.
(just my .02)
i am guessing that you may be more concerned with how they look on both the front and the back together. if so, i can't help you here, ...
joe