Everything was about what I expected - the location is great, very convenient in the Gaslamp district. Lots of room inside, great shower/bathroom.
On the negative side I would note that the check-in process is kind of a hassle - you need to schedule the exact time, it must be after 4pm, then you need to wait (if you arrived early) for someone to show and walk you through a bunch of instructions and paper signings... In my experience of various other Airbnb stays, the check-in is usually way easier and more flexible.
Keep in mind the street noise level. It is mentioned, I think, in the description, but may make a big difference depending on your personal level of noise tolerance.