I had a great stay at Charles & Emily's place. For me, it was perfect. The apartment has everything you could ask for and need ... super clean, and modern as advertised. If it wasn't for all of the great places in the area, the Viking stove was tempting me to cook.
I didn't get to meet the hosts in person, but they were proactive in checking up on me to ensure my stay was as comfortable as possible.
SF is one of my favorite cities and I will be back again. If it is not booked, this place will be first on my list.