This place is highly OK. If you need food for lunch, it'll get the job done, but it's nothing special.
I had the tuna, my dad had the Reuben. The Reuben was a bit weird as it didn't have dressing, just corned beef, kraut, and Swiss.
The big thing though was the bread. I used to live in SF and this isn't really close to SF sourdough. It's pretty flat and if you're going to name the restaurant after the bread it better be pretty darn good.
I should also point out that if a restaurant is going to invoke SF, using styrofoam plates is a little incongruent, not to mention that it didn't look like there was a recycling bin for drink bottles.
So yeah, this place is fine, but it's definitely not worthy of the four stars it had when I went.