Barbara and her husband are great people. They were really easy to talk to, and are very down to earth.
The location is pretty close to downtown Amsterdam through transit (I estimate no more than 20 minutes with bus and metro). The neighbourhood is very quiet, and there's plenty of opportunities to go for a walk. The rooms are on the 3rd floor, up winding stairs. So, try to avoid heavy bags. While their laundry is in the shower room, they do everything they can to make sure you have full privacy in your space.
The only thing to keep in mind is they have kids, and they can be a bit loud sometimes. It generally didn't affect my sleeping, but if you're okay with kids, then this is a great space. But you'll probably hear them in the morning/evening.
My next trip to Amsterdam will include their place (if not already taken).