Used these in Yosemite for two weeks. Just awesome. Only issue was dust/dirt getting inside sock due to low cut, but I knew that going in to the trip. I have traditional smartwool socks for those occasions.
Pros
WICKING & ODOR RESISTANCE: Merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather. Through the process of wicking, Merino wool is the most breathable fabric and absorbs moisture better than any other fibers. Wicking refers to a fabric’s ability to pull moisture away from your body and keep you comfortable.