I am tempted to keep Museum Suites secret so that it does not become hard to book! The location is great, on a comparatively quiet street within walking distance of the Rijksmuseum and Van Gogh, and with a tram stop for the centre nearby. The rooms are very comfortable and nicely decorated, consisting of a living room /kitchenette and a separate bedroom with ensuite. There are generous coffee/tea facilities in the room as well as frig, microwave and a good selection of cutlery/crockery, so we made our own breakfast every morning (they will provide breakfast if requested). For the evening there is a range of restaurants nearby.
The Suites are kept spotlessly clean and Annemarie and Frida made us very welcome and were very generous with imparting information - they are obviously very proud of the Suites and of Amsterdam, deservedly so.
The only caveat is that it would not be suitable for anyone who can't do stairs. But if that is not a problem then Museum Suites is an absolute jewel.