This was a fantastic trip. Having the variety in landscape (from steppe with nomads to remote forest/valleys) was a treat; visiting with nomads (at the family we stayed with, the gers we stopped by on the way, and with the horsemen the entire time) was also a highlight. What a marvelous and beautiful place!
Seeing and experiencing both steppe and mountains of Mongolia; spending time with the horsemen on the trip and the nomads along the way; birdwatching and wildlife viewing.
There was more repetition in the trail than I realized (I was expecting more of a loop), although the horsemen did their best to mitigate this for me and it turned out well. A couple of the heavily used camp sites had voluminous toilet paper behind every bush; tourists should be taught to carry it out or otherwise permanently dispose of it. If it's from locals, this may be a more difficult problem.