Wonderful experience from start to finish! Anna was very communicative throughout the process, responding to my emails quickly and making our vacation planning quite stress-free. We arrived after midnight and let ourselves in via a simple self-service mechanism, and found a very clean and recently-remodeled unit that was much nicer than expected! The apartment (we visited in winter) was warm (I think the heat was from a radiating floor-heating system), comfortable, spacious, and a nice blend of rustic decoration with modern amenities -- loved the fully-furnished kitchen, shower+bathtub, and the piano. WiFi also worked great. Finally, there was a pretty snow storm while we were there, and we opened up the curtains and were treated to really pretty views of the snow falling.
All in all, the "Yellow House" was one of the high points of our short Bozeman vacation, and I highly recommend it. We hope to stay there again the next time we're in town.