It’s wonderfully soft, a little splittly to work with until you get used to it, washes well, but I’m not sure how hard wearing-- haven’t had them long enough to tell!
I have never knit a sock, let alone a sock knit from bamboo yarn.
But I own several pairs of socks knit from bamboo blends, and I [I]love[/I] them. Really comfy and supposedly they make your feet less likely to smell. Not sure if the odor of my feet has improved but they are very soft.
I started a sock using 100% bamboo yarn and frogged it and made a scarf instead. I find bamboo very limp. I like socks to stay up and not slide down around my ankles and the bamboo just had no elasticity. It was incredibly soft and pettable and it made a lovely scarf that I gave to my sister.