If they made the black/green sock combo in my size, I'd probably like them, but as it is, they are about 2-3 sizes too big so the heel ends up about halfway up the back of my leg.
I just did a BFT a week ago and as I usually have a problem with blisters. I wore three pairs of socks. The black nylon ones next to skin (turned inside out so that the seam doesn't cause a blister), then cotton tube socks, then a pair of very snug wool socks. Sounds weird, but it worked. I was worried about one of the inside ones sliding down but they didn't. I had the tops of the black pair and the cotton pair folded over the top of the wool one.
I wish the military would make tube socks instead of socks with heels. :-\