I had the best time in Prague at Jan and Sarah's place. Jan picked us up from the airport, told us hilarious stories, and hung out with us for a night showing us what a real Prague night is. He told us where we should really eat and what to do and see.
The apartment was beautiful and bright, extremely close to the Old Town square. It was walkable to everything we wanted to do and see. The apartment has everything you might need and is very comfortable for just hanging out as well as a home base for relaxing before going back out for the evening. Overall I'd definitely recommend this place and hanging out with Jan while you're in Prague!