I had a really nice time there. I was there for about 10 days. You get basically everything as advertised. Some more facts: Walking to Berkeley-Bart-station takes 30min. Within a 10-15min walk there are places for groceries and several cafes.
The house itself is really nice. It has one bathroom shared with Jon, which worked without any trouble.

One comment to the "Eco-friendly". It is very descriptive already, just let me point out that most of Jon's ways are common-sense and it didn't really interfere with my stay. What I want to say is: Don't be scared about fanatic rules. This is not the case.

Jon himself was a great host. Always helpful. And if something unexpected comes up he finds a way.

I would definitely stay there again if I get the chance.