We stayed in Franks apartment for 11 days over Christmas and had a very good time! It's the perfect place for 2 in a great location: very central, but still quite, because the apartment is on the backside of the house.
The apartment itself is cozy and the equipment is very good. Everything was very clean when we arrived and Frank even offered us to send in the cleaning woman again during our stay.
Frank himself was very responsive after our booking and turned out to be a nice and helpful guy when we met. When we mentioned that we planned a dinner with 4 friends in the apartment, he even brought us an additional chair - thanks again!
All things considered it was the best equipped apartment we've been to so far and a definite recommendation!