The leather wears great. The soles are very comfortable and silent as a ninja. They wear very well. Some of the best I have ever owned.

Edit: Feb 2015
After several months of wear, I would recommend the Clark's Bushacre instead if you are looking to wear the boot frequently.
The crepe soles on the original clark's desert boot wear out very quickly and provide little structure to the shoe. The degradation of the soles eventually leaves the shoe looking loose, flimsy, and unprofessional.
My wife has a pair of original crepe desert boots that she loves because she wears them occasionally and they have therefore held up well.