We really enjoyed Franks flat, it's a mix of cool and individual deco, big open space and cosy terrace to sit on for breakfast.
We loved the location: lots of local restaurants, the Jordaan area is very charming, you're away from the touristy bits but very central. All in all a great stay, would love to come back there for a longer period!
Only downside: as Frank was away, the checkin took much longer than expected with the agency.