We had a great stay with Servio. My husband and I stayed for three nights during the King's day celebrations in the green room.
The B&B is in a great location just slightly out of the very centre. This was perfect during the celebrations as it meant we could walk in to join in with everyone and easily escape when we'd had enough.
We thoroughly enjoyed making our own breakfasts, it was lovely to have warm bread and croissant every morning.
I think the only very minor things that would have improved our stay would have been to have our own bathroom, though sharing was not an issue as the facilities were kept spotless, and a safe in the room would have given me a little more peace of mind.
Overall we had a great time and would highly recommend the B&B to friends and family travelling to Amsterdam.