I've never meet Lin in person but the guys who helped us during the trip were very friendly.
The appartement was clean, everything that appears on the photos were there, very good quality.
Few problems will be the fact you can't access to the rooftop and can't go on the balcony and also the hundred of stairs (but it's not a problem when you can enjoy a apartment like this). We would have loved to enjoy it.
Anyway we loved our stay in Amsterdam and thanks to this appartement everything went well.