My boyfriend and I went to Amsterdam in September and stayed for 5 nights at Joni's apartment. We absolutely loved it.
Joni's apartment is just perfect. Location, design, cleanness, amenities, everything was great. His mother-in-law Ada was very kind and explained all that we needed.
Also, Joni and his wife were really lovely: there were a bottle of wine and flowers welcoming us. :)
Jordaan is a great neighborhood to be: calm but with bars, restaurants, market stores and close to everything you need. We rented bikes (there's a bike rental store just by the corner) and it was our main transportation during all the trip.
I specially loved the sound system at Joni's apartment: we could plug our iPhone and laptop and played music all around the house, even in the shower.
A perfect experience at a perfect town. I truly recommend it!