The property was excellent. Authentic log cabin in the middle of a canyon. Beautiful inside setup, from wall decorations to furniture. Convenient layout for 8 people (2 families). Everyone had their own room for the night and place to chill. Outside was beautiful as well. Lots of snow and nature and beautiful view out the window.
Roads suck, but we've been warned so that's not on the host. We got stuck going up in a Q3 quattro with decent tires. Should have followed Mark's suggestions and gotten the chains, but who knew, we're city people. If you come here in the winter, definitely get a 4*4 car with chains or a lifted truck. Also try to go up the small roads in one shot, don't break. That's how we ultimately ended up going up. Sand doesn't really help. You basically have to slide back down to a flat area and gun it until you get to the house. Turn around and park facing down. If you're snowed in, you won't be able to turn around in that driveway.
Also, lost power due to snow one of the days. Ended up staying in and building a puzzle. Plenty of board games and analog entertainment (books, puzzles, ...). Unfortunately no generator. Fireplace works fine. Had that going the whole day to keep warm.
Location was good. Basically I'm the middle of nowhere. If you're planning to come here in the winter and ski Park City, it's probably not the best location. It's fairly close on the map, but the through canyon roads are closed until May. You have to go back up through SLC which is about a 50 min drive with no traffic. The day it snowed the drive was almost 2 hours due to a couple accidents.
Get food ahead of time. The nearest store is 30 mins out. Plenty of spices and sauces at the house, but get water and everything else.
Overall a good experience and an excellent host. Mark kept us up to date on the power outage and was available to answer any questions throughout the stay. Would stay again with proper planning.