Don't understand why ski socks consistently engender excessively directive / critical comments here. I've seen it before on other sock & cold feet threads.
I can't say "I use such-and-such sock." I guess I MIGHT go out and buy four or five pair of the same ski sock if I fell in love with a particular brand and model and I could get a reasonable price on them. (I am not going out and spending $100 to buy five pairs of socks @$20!) However, in practice what happens is that by the time I've decided I like a particular sock they don't make that model any more. Therefore I've accumulated a motley assortment, as I'll bet most Bears have. I like some better than others. Strangely (?) I don't always like the same ones. I'll wear a pair one day and think, "these are my favorites" and then another day with the same socks I'll think "these are too thick," or whatever.
I had never thought very seriously about compression socks one way or another, especially given how expensive they can be. Then this summer I lucked into a pair of CEP compression socks that a friend was giving away because they were too small for him. They are very thin - I'd say too thin for my particular ski boots, probably, although I haven't put ski boots on with them yet. I've been wearing them with a second pair of ankle-high bike socks over them for some MTB rides this fall, including during a race that included 30mi of singletrack. Somewhat to my surprise, I've found that I really like them for biking. Not sure I can totally explain it except by saying that they are comforting. I do believe I get a bit more longevity out of my legs during a ride than without them, provided it's not ridiculously hot out. I have no way of quantifying this, of course. Would I pay $60 for a pair, though? Probably not. Anyway, I will be trying them out this winter, for sure.
In the wake of these experiences I bought a pair of SmartWool compression ski socks from STP on sale. Have worn those cycling a couple times, and am no where near as impressed with them in terms of fit and function.
As for the Blistergear review of the CEP ski socks that sibhusky pointed to, not sure why they even published the write-up from the first guy, because basically he said, "These socks are too thick to wear with my boots, so my feet were cold." Well, duh. That's not really a review.