The apartment is as described, and very well equipped. No part of the process was a pain, which can be an issue with STRs.
The only issue is that the Ski lockers are on the same floor as the apartment, so skis have to be transported down several floors every day. A ski shed or such at the base would be a vast improvement, though up to HOA not host of course.
That said, it's real ski in ski out - when you are at bottom it is no issue to go on and off Right of Way. This is not true of all places at Steamboat, some of which require a hike uphill in one direction.
We were 3 people, a couple and a 13yo daughter who slept on sofa bed. Space was sufficient, but not lavish. It would be better for a couple, as bedroom has barn doors, and bed takes up whole LR. That said, we have no regrets about 3, we were there to ski.
I would recommend this host, and this rental, unequivocally - the above is just to give data for those who might find it useful in assessing the fit