For 110€/night I would not call this cheap in another city, but in Amsterdam it sure is a great value. The location is perfect, just five minutes walk from the West-Church (so 10-15 from Dam Square). The place has three rooms, all very pretty. The ones on the top floor are somewhat more "typical" and cozy, but the stairs to get there are reeeeeally steep. The room on the second floor is very nice as well, and easier to access, with a somewhat bigger bathroom.
Alright, as many other reviewers said, the biggest plus of this B&B is probably the breakfast. Every morning Vicky would lovely prepare you eggs, bacon, waffles or some other sweet, toast, fruit and yogurt, all generously served with Nespresso coffee.
If I am back in Amsterdam and still want to be in a B&B I would surely go back to Bayan!