We stayed with the 2 of us for 3 nights at Martijn and Kim's place, and loved this nice little getaway for Amsterdam city center. It is cosy and feels like home in an instant. We were out a lot, but never too far from the AirBnb, as it took just 10min of cycling once you pass the IJ river by ferry. We do love cycling, so for us this worked all well and all the time.
If you like to spend the whole day in your room it might lack the comfort of nice chairs and other furniture, but who wants to when you're in Amsterdam, right?
The North of Amsterdam has lot to offer as well, don't miss out on that. Think of the Eye museum, Ma'dam restaurant (or others in the A'dam tower) and the Tolhuistuin terrace.
The hosts are super nice and checked with us frequently if all was good.
Would definitely recommend this place to others.