I don't have any personal experience with the unit. Access is relatively difficult, with the train being the easiest way to access the goat country. It is extremely rugged country. Success rates the last couple of years have been around 60% for archery hunters.
My personal opinion is that there are more accessible units with better success rates a lot closer to Ft. Collins. Don't rule out archery hunting a rifle season. Many, many people do it with great success, and some of the archery only tags are harder to draw than rifle tags.