In general we had a good experience at Roberto's place. Our room was nice and clean, we had anything we needed available to us. Roberto and his co host were friendly.
Theres two things to note however:
During the night time the upstairs sockets didn't work, so we were not able to charge our phones.
Also, communication was a little slow. I had to text the host twice to make sure everything was OK and to get the check in information. But they responded quite quickly and thoroughly after that.
A huge bonus however is the location! It's a quiet and what seemed to us also a safe area, only a few minutes walk to the tube station and you're in the centre of the city in no time.
We also really appreciated that we were able to drop of our bags way before to he official check in time, and leave them there after checking out so we could enjoy the city without dragging them around.