I now own 6 pair of Spun Bamboo socks and three SB t-shirts (2 short sleeve, 1 long sleeve) ... and the quality is great to the point of being luxurious. The t-shirts feel so good I don't want to wear them to the gym and get them smelly and dirty. The SB socks make me want to throw away all my other socks. Wearing some right now while I write this -- they're smoking jackets for the feet.
Wow, love them!
Overall, very comfortable. They seem to be cooler than my usual socks and my feet don't seem to have any athletic odors after exercise, etc. after using them.