This is great value for Amsterdam. It is a clean, private, quiet room that allowed me to spend money on the things I wanted to. There is enough space to be comfortable as a solo traveler, but it's not the sort of place I think many people will want to hang out in... but you are in Amsterdam, so explore! The location is a short walk from the metro station and is near a grocery store. It's a 20-25 minute walk to the Museumplein or a ~12 minute tram ride. It is in a quieter part of town and I was not disturbed between 2000 and 0600.
Hein is very nice and has lots of local tips. I recommend talking to him early on in your visit.
The wifi was a bit spotty, but the cell phone reception is good and I used a local hotspot much of the time. The left side of the bed is a bit more comfortable than the right. Coffee addicts should look up how to use a moka pot if they have not used one.