I was in Amsterdam with a friend for NYE and have stayed in mark's flat for 5 days.
It was a great experience, the flat is beautiful and lovely, really clean, we have found all we needed.
mark is really kind and available, he's also made a little guide (make by himself) to find the best places to do shopping, addresses of really good restaurants, night clubs, bars, museums etc.
It's easy to go to the center, the place is really close to the tramway and buses station and it's not expensive by cab.
I'm sure that I will come back to this apartment for the next awakenings festivals :)
Thank you mark