If you need to rent cross country skis do not go to Neptune Mountaineering! Their prices are 3 times as much as getting them in Estes park and more than twice as much as anywhere in Boulder. A one day cross country ski rental from Neptune cost $30. If you reserve ahead of time at Crystal Ski Shop the cost is $12. The anytime price at Estes Park Mountain Shop is $10. I would have never rented my ski's here except I was already set up with my gear and was on a date. Also, the incompetent person that set us up with our ski's gave use the wrong size for our weight and was slow about the process. Go to a real ski shop for rentals so you do not get ripped off.
Pros: Good gear.
Cons: Terribly high prices. Poor service.