We spent a very enjoyable three nights in Juul & Ruben's apartment. It's compact but comfortable and has everything you need, including a nice comfortable king size bed and a great shower.
The area is nice and quiet with lots of great cafes and places to eat nearby (thanks to Juuls & Ruben for the recommendations!), and many of the main museums and galleries are within easy walking distance. We'll definitely be staying here again on our next trip to Amsterdam.