Wiby and his wife are very good hosts. Everything that was written is that way. Maybe it is a bit uncomfortable that the guest toilet is on the first floor and room is on the second, but we could manage with that. They don't have strict rules and they are very open for any kind of agreements. They also have nice bikes that you can rent for just 5eur a day. It isn't too far from city center and you have metro 54 that goes from central station to their place (station is just 3min walking). Also, neighborhood is very quite. I can recommend this accommodation to anyone.
Anyway, we had great time in Amsterdam, and this is the most uncommon city I have ever visited, in a good way, off course. I hope I'll visit this city once more, and I would stay at Wiby's place again.
I wish to anyone that goes to Amsterdam to have nice time.
Goodbye :)