The overall experience from SFO's Signature was OK. I had a short repo flight from Heyward to San Francisco, and unfortunately we had nobody to Marshall us in at SFO. The funny thing was once we shut down our engines, the guy came running out with his luggage cart, even though we were the only general aviation airplane that was leaving/departing at the time. I know the FBO might be busy, but when it's not busy, like the time we were there, they should have someone there to Marshall us up in or greet us BEFORE the engines shut down. Other than that, the FBO was nice and clean and it was an OK experience. Will most likely come back to SFO.