I stumbled on this gem of a hotel very much by accident after my original hotel (The Atlanta - not a great place) screwed up my reservation.
What I found by pure chance was a funky art house, completely remodeled in the heart of Amsterdam's tourist district.
My room was delightfully bizarre - a bit tiny, but clean and very comfortable.
Flat screen TV and private ensuite were great bonuses.
The staff was fantastic and gave me a late checkout on my last day.
Grand Centraal is a 5 minute walk away, and all the city's main attractions are easily accessible.
Thumbs up. I would highly recommend The Exchange!