It's a tiny step in the right direction. Colorado has long needed a better car free way to get to the slopes. There should be multiple buses DAILY (not just weekends) from various parts of Denver to various ski resorts. From Portland (not nearly the skitastic city that Denver is) I can catch the Mt Hood Express to Skibowl and Timberline no less than 8 times a day including trips that allow night skiing for all of $5 round trip. IIRC, the only ski area served by RTD is Eldora, and that's on a fairly limited schedule.
The Mt Hood Express is wonderful if you are in Sandy Oregon. It does not travel from Portland. Sandy to Timberline Lodge is 36 miles -- that would be like a bus that goes from Arapahoe Basin to Idaho Springs .
The Mt Hood Express does not go to Mt Hood Meadows (the biggest area on Mt Hood).
I really don't see a good comparison of the Snowstang to the Mt Hood Express