I joined this tour when I was in Denver on business and wanted to do something active and enjoy the nature (and get rid of my jetlag). The group was 10 people in total and we had 2 guides (Robyn and Win). They took us to the National Park and on a trail to Club Lake. Nice hike, in total (incl return) nearly 5 miles. Great experience, saw a few moose and an elk. Both guides have a lot of information to share, during the drive and during the hike. They check regularly if everyone is still ok and enjoying themselves. They both did an excellent job and are very enthusiast about hiking, the park, nature etc.. Would love to go with them some day for another hike and can't recommend them enough.
Key points for improvement:
It was quite a warm day and the airco in the bus was insufficient to cool the back row of the van. It worked ok when cranked up to the max setting, but then you couldn't hear the guides talking anymore. So they switched to low while talking but that was putting a strain on the folks sitting at the back of the van. So, I recommend to get a van with better cooling (eg with vents in the back rows, this van had only vents in the front row.