Staying at Retreat at Union Creek II was a good match for us. We had 3 generations, me being the oldest (grandmother) and 5 grandchildren aged 5 to 14. My husband and I chose the floor closest to the kitchen and the kingsized bed. (heck, we were paying) The expense of the unit was offset somewhat as the adult skiers skied in for lunch. The kitchen was furnished so well, that we could cook most anything that we desired, or GRILL outdoors. So, we never went to a restaurant! 11 would have been hard to manage. If you're there during ski season, this unit is on the green (easier) side of the mountain. Having mixed skiing abilities, beginner to expert - everyone could get started right by the Lumberjack Lift, could ski down to ski school after 1 lesson.
The amenities left for you to use, were more than adequate. The soaps shampoos, dryer, dishwashing, washer, paper towels, salt pepper, seasonings, etc. made life a little easier and shopping a little cheaper.
When we had any little issue, the numbers to call were manned and did respond promptly. That is always a good thing.
I would definitely consider staying here again if I return to Copper Mountain!