We stayed here 8 nights and enjoyed every night. The apartment is well located, it's close to two subway stations and a lot of nice restaurants are in walking distance. It also is clean and quiet in the apartment.
I didn't had a chance to meet Casper, but we had contact via text messages. He is very friendly and helpful. He was always reachable and checked if we're doing well also during our stay. I totally recommend to stay at Caspers place :) he is a great host!