I didn't get to met Roberto & Agata during my stay, however the comunication was good and their friend Florian showed me around and made sure I was ok and had everything I needed during my time there.
The place was spotless, cosy and very comfortable. The location of the house was great, quiet neighbourhood, with 2 tube stops close by and walking distance to Central St. Martins (the main reason I chose this location)
Overall a great place to stay, would highly recommend.