I have done several tours with Byam, and they were all great! He was very flexible and suggestive on the itinerary. His knowledge of Mongolia was amazing too.
The tours were all amazing from the parks, city, and the largest Chinngis Khan statue. The parks had amazing landscapes and untouched nature. Then the city tour gave a good insight tour offered a lot of history of the country from old to the modern. Lastly, the Khan statue (one of the biggest horse statues in the world) is a sight of its own and needs to be seen by the human eye.
Along with these tours, I did do some add-ons not listed on Tripadvisor. Some of them that I will list range from museums to a traditional Mongolian play. I personally enjoy informative acitivies, and the museums offer a lot in Ulaanbaatar. Then I think the biggest one of them all was the traditional Mongolian play; this play demonstrates traditional instruments, throat singing, dances, and more. I highly suggest this to anyone.
If you are ever in Mongolia, Byam is a very good person to book many tours with. He will definitely build you a wonderful vacation that you will enjoy.