We had an absolutely wonderful stay with Yuca.
His place is in a perfect location. It's high up so you get fantastic views and it's out of the way where it's quiet. The walk to the Castro area takes about 10 minutes and is really beautiful. We walked all over San Fran and we honestly couldn't have picked a better spot. Castro is unique and there are interesting characters and architecture everywhere.
The room itself was lovely. It's spacious enough for two people and the bed is super comfy. We slept so well. The en suite is nice and you can have as much privacy as you want. He left fresh flowers at the side of the bed and replaced used water glasses each day - a lovely touch. Yuca lives upstairs and is happy for you to use the kitchen and provides coffee and use of the fridge to store some things if you like.
As for Yuca himself - he was the perfect host. He made sure he was available for our arrival and gave tips on places to visit and where to eat (they were good recommendations too as he's lived in the area for a long time). He was keen to talk and even invited us to join him at a local bar on our last night which was a nice touch.
We'd definitely recommend Yuca's place. It's our first AirB&b experience and he's set the bar high.