Let me state upfront that the property we stayed at, while not what we booked, was great. Marriott's Mountainside was convenient to the slopes and a ~20 minute to Main St. Great staff and plenty of activities for any non-skiers.
The problem was that we booked Marriott's Summit Watch. We wanted to be closer to Main Street with access to town lift. What I did not realize when booking is that "Christian" is really Resort Rental Pros, which we did not know when booking.
We received a "reservation confirmation" on Jan 19th. On Feb 19th, 3 day before our planned check-in, I received a text stating that they could only confirm 3 of the 4 nights and I had two options: 1) accept the 3 and hope a 4th became available or 2) accept the full 4 nights at a different location (Marriott's Mountainside). As you can imagine we were in a bind as there was next to nothing else available in Park City on such short notice. Not only did they not recognize how inconvenient this was- all plans (reservations, rentals, shuttles, etc) had been made based on what we thought was a confirmation. To make matters worse, the support team was pushy with regards to "accepting" one of the two offers; like the error was on my end.
In the end, we had a great time and Marriott's Mountainside was great. That said, I won't be working with Christian and RRP again and would not recommend to others.