I'm a former local correspondent in the Silicon Valley for (website hidden) and (website hidden).
Florian is a very noble couchsurfer! He is giving, generous, funny and helpful! I am sure you'll have a great time being hosted or hosting Florian! We met in SF through (website hidden)
I met Florian through the Couchsurfering organization late 2011. He is a great guy: smart, funny and def a trustworthy fellow! He has a good head on his shoulders and you would have a great traveler staying at your place/with you!!