Just returned from a weekend away in Amsterdam. Tycho & Justin's place is brilliantly located, only 3 minute walk to tram stop which will take you to Leidesplein, Dam Square and Centraal Station. Tycho was very helpful in leaving the key for us so we could drop off our luggage. The room itself is lovely, however it is located up 5 steep sets of stairs. It's been decorated really well and was very homely! Just to note, take your own towels as only hand towels and flannels provided. No soap either. Ideally if you can, take ear plugs and an eye mask; the blinds do not cover the windows well and the sun shines through.
Unfortunately as I say you will need earplugs. The walls are extremely thin and you can hear everything! On our first night we were kept awake until 2am as the hosts had guests over, they were talking loudly, doors were slammed and music was loud (House Rules for guests say no loud music after 10pm!) I understand it was a Friday night, but thought this was a bit rude and unfair as we'd had a very long day.
On the second night, after another very long day, we were once again kept awake. This was through doors banging, loud music and the washing machine being on at 1am!!!
Overall, I'd say this room is great for location but the lack of sleep and respect for guests really let's it down. Hopefully other people will have a better experience!