Great location and super helpful host! :)
Me and my family had a great stay at Dries' place! He was really helpful and we managed to get in touch really easily with him whenever we needed. He helped us with early check in, taxi transportation and travel tips. The building is also very well located and you get very quick access to the center of Amsterdam on foot.
Dries also provided us an urgency number that we could call. We accidentally locked ourselves outside the building at 5AM, and by calling this number, Dries promptly helped us by sending a new key!
The place was also very clean and comfortable!! The only thing to bear in mind is that the stairs are really steep, which could be somewhat cumbersome if you are bringing very heavy bags (although I think this would be a problem for most buildings in Amsterdam, since elevators are not so common).