Diederik's place is amazing. Great location, clean & designy apartment and very cosy. We stayed for 5 days and had really great time there.
Unfortunately in our second day I invited one of my friends from university when I was graduated in Amsterdam. He came with a stupid thing in his hand which i even didn't know what it was. Diederik messaged me right after my friend was in house. Apparently one of neigbor told him that we were partying at the house with 3rd person early in the morning, which was not true. At the moment I was just shocked and couldn't say anything to Diederik. But personally I didn't like the way how he responsed, and also my friends action was not nice when i was realized what he took with him. So that day we felt a little bit bad. I'm still sad that we couldn't explain our situation during our stay. So my advice is don't invite 3rd person to the place,it was not explained on the houserules, but i'm sure he'll add that after our stay.
Except that everything was supercool. Recommended place! Thank you for everything.