Going over Christmas. There will be 4 of us. Any shuttle recs?

Colorado Mountain Express. I've also used Summit Express but I don't like them as much for two reasons. They don't have a counter in the airport like CME does so you have to keep an eye out for the shuttle. That's pretty inconvenient if your flight is delayed. CME will take your luggage, show you where to wait and then tell you when the shuttle is there.

The other thing is Summit Express uses multiple shuttles to pick people up around Summit county then meet at one location and then take one shuttle back to the airport. I've almost missed my flight waiting for other shuttles.