We stayed for six days. Close, in Central Amsterdam, not far from Ann Frank House. In central part of city so walking to sights possible but trams close by as well. Nadia has that 'old country' flavor, very quaint, eclectic but charmingly so.
Rooms are small but emaculately kept and are neat and clean as can be. Each comes with it's own bath, TV, closet and plenty of extra shelves for luggage storage. The breakfast room is a nice space and food is nicely laid out for easy access. Food is generous and there is plenty of variety: juice, a lovely yogurt, croissant, rolls, sweet breads, Dutch cheese and great coffee.
We were a bit reluctant since the reviews were all over the place, but our experience was top notch. You could no doubt find better accommodations in Amsterdam but I'm sure you'd pay a lot more. Nadia is good value for the dollar.