i have the weathertech digital floor liners for my terrain. Ordered them on Monday and received them Thursday...much quicker than I expected. I ordered directly from weathertech over the phone. Very happy so far. Driver's side is posts and fits great. Passenger side just fits on floor as does back. Passenger side is good but I think an inch or two short on the back end. if that seat was all the way back, i think more room could have been covered. The back is one piece and great fitting. The back is thinner than either front mat. . Customer service said it is like this since the second row generally gets less traffic. Actually, with kids, my back gets more. They work great though. Was a pleasure to take them out, run them under a hose for a few seconds, brush and rinse and dry. Vacuuming underneath was really not needed. The left drivers side edge-notoriously a dirt grit collector was clean as a whistle because of the lip on the side of the mat. That feature alone is worth its weight in gold in my opinion.
I also ordered neosupreme car seat covers from coverking to arrive tuesday. The cloth interior of the terrain is something i want to keep clean.