Joannekes little apartment is a perfect homebase for exploring Amsterdam. You are right in the center and everything is within walking distance. The entry to the apartment is behind two locked entrance doors, so you are in a gated side-alley and from there there's another gate into the little backyard. It was perfect for leaving our rented bikes right in front of the apartment. I wwould also recommend renting bikes cause it's the easiest way to get around. We rented ours at black bikes which was just a 5 minute walk away.
The apartment itself is a very cosy place in a building that once was a workshop of sorts. It has a little bathroom with a shower and a little kitchenette. There's no stove, but a water cooker and enough dishes so you can bring your takeaway food in case you want to eat at home.
Communication with Joanneke was easy. I can very much recommend her place for your stay in Amsterdam!