I see a lot of reviews that are written by people who've had these for a few days. Well, I've had mine for six months and they are already shot. I wore them 3-4 days per week just walking normal distances in a city. The outer wool fabric has held up well but the sole is worn through on the ball and heel on both shoes, and the fabric at the back of heal (achilles area) had a hole worn through it after only a few months and now is completely worn out. I wore them barefoot or with wool socks as suggested.
I contacted customer service sending them a picture of the premature wear and my order number. They got back to me fairly quickly and...asked for a picture. I sent them another picture and my order number again. They then got back to me and asked for...my order number. So that was an intelligent interaction. They did send me another pair though.
These are $25 Chinese garbage that they are upselling you for $150. Comfortable though.