I've started my first Kandahar sock for the Socktopus KAL and it looks like the Elann Sport S01 yarn is going to work out just fine. As I suspected it's very thin for a "sport weight" yarn. Unfortunately it's also quite splitty which has made it quite annoying to knit with so far. However, as I have quite a bit of this yarn, it's "suck it up, buttercup" time. I originally ordered it for a sport weight baby blanket, but owing to thinness and scratchiness it's sock yarn now. Fortunately it is 75% superwash wool + 25 % nylon so it is entirely suitable for sock knitting. And maybe, just maybe, it'll be really durable for socks.
On a positive note, I do really like this "Bleached Oak" colour. And I'm hoping that after a few more repeats I start to like the pattern. Right now it's feeling very "eyelet-y" which isn't really my thing. The pattern is quite complicated; there's little chance of memorizing it, so it's not the best travel knitting. Which is too bad, because we've got a few hours in the car back and forth to the cottage on Lake Erie this weekend which would have been prime knitting time. I've scanned the pattern to put into Knit Companion on my iPad so I'll have to see how much I can get done. Having a guideline to keep track of my chart row is extremely helpful for a chart like this. I'm entirely hooked on Knit Companion these days, and wonder how I ever did without it.