I had an overnight in Amsterdam and booked this hotel based on location and price. It scored well on both accounts. The staff are lovely and helpful, even loaning me an outlet adapter for my cell phone charger. It's true the single room is incredibly small but the bed was comfortable and the decor was very nice. It was obvious the bathroom had been recently remodeled and was modern and stylish. The breakfast (included in my rate) was really nice, even including some meats and boiled eggs along with pastries, toast and espresso.
The stairs are super steep and narrow but that's Amsterdam and, I think, part of the charm!
I decided to stay another 2 nights and wish I could have stayed here but, unfortunately, it was booked so I moved a few doors down to the Hotel Nadia (same owner but very different).