My husband sells them a lot of their fabric to make the yurts and I can tell you they are very conscientious about quality and very reputable people. He has been dealing with them for several years and hears a lot of positive feedback about their yurts. I haven't had the chance to check one out but they seem really cool.

Google Spirit Mountain Yurt bbb
(better business bureau.)
Among other things, this is what you'll find:

www.yurtinfo.org/forum/read.php

I have had no dealings with them myself.

I recently emailed the contact address on the website - info@spiritmountainyurts.com - and received a very fast reply (it was in my email box the next morning) from Nalina. My questions were specific to our building site and she answered each question. I replied with a little more information and received another reply, again, very quickly. I was so impressed with her prompt replies and the way she answered the questions, too. When we are ready to buy a yurt for our Chihuahuan desert property, I am sure we will go with Spirit Mountain Yurts.

YAY! Spirit Mountain Yurts IS a fantastic and conscientious company. I live .08 miles down the road from them and they are some of my best friends. Their yurts are great quality, especially the Fortress. Their website is spiritmountainyurts.com. Nalina is really great about replying really quickly and thoroughly. Best of luck.