This was a great find! The house has several rooms, each individually electronically keyed, and I was in #15, which has a small balcony and faces 3rd Street. A few words of warning on #15: the street can emit fairly loud road noise, but I had ear plugs and it was never an issue. Also, there's a street light outside, so I wound up using an eye mask too. I'm fairly tall (6'2"), and there wasn't a ton of space left over once I layed down, so if you're much taller you'll probably want to pick a different room. I realize these may sound like complaints, but none of these things negatively impacted my stay at all - you should just be aware of them in case these details matter to you.
All that said, the bed was comfortable, there was always an open bathroom (there are 3), and I made use of the kitchen. I didn't use the stove, but the microwave works and there are dishes, cups and utensils available. Also, the location is great - easily accessible via light rail, and within walking distance to lots of good restaurants and a Safeway.
Guillermo responded really quickly to all my texts, and when I saw him in person, he saw that I was tall and offered to put me in a different room where I'd be more comfortable. I didn't take him up on this, but I appreciated the offer.
I'd 100% stay here again given the chance.