I had a great stay here. The apartment was a very modern and cozy place. As a cat person I appreciated Tobi and Guusje being around. They were both super sweet, friendly, easy to take care of, and provided me some company as a solo traveler.
The location is great too. Oost is a bit more residential, which on the plus side means the streets are quiet and you don't have to deal with the late-night Amsterdam partiers walking around. However, there are plenty of nice bars, restaurants, and cafes within walking distance still. Also if you rent a bike, it's also only a 10-15 minute bike ride from central Amsterdam. And if you don't want to bike, the metro station is just a few minute walk away, which will get you to central in no time.
Stefan was also super easy to communicate with and very responsive, which made my stay that much smoother.