DD (5.5 yo, 40 #, 44") in the center back of an '05 Silverado crew cab (will move outboard, passenger side soon):
She is even wiyh the third click from the top, so this is second from the top. The slots dont exactly match up/are a bit higher than the openings in the cover.
Growing room:
ETA: It seems reclined enough without using the carseat's recline feature, but I won't know for sure until DD falls asleep. Also, it seems cushy, but I guess DD will be the judge of that when we finally get around to driving somewhere. I am betting the big, poofy harness pads come off in the first five minutes, though.
The install wasn't terrible, but, if I'm being honest, was a bit confusing. The belt path wasn't intuitive to me, which was complicated by the unused (Click Tight leftover) flap. I think I got it figured out, but I'll probably post some pics in installation after the kids' bedtime.
One final thought: This is our first seat with an adjustable headrest. I dont know why, but I was taken aback by how loose it is. I was afraid I was going break it. I guess I'm just used to the beastly, solid TF, Radian, etc.
ETA: We definitely ended up needing it in recline in that center position. Head slump city...