The ambiance was great and the food was creatively presented, even if it did arrive lukewarm. My major complaint was with the service. Fifth Floor aims to compete with the premium players in San Francisco-Gary Danko, Michael Mina, Masa, Fleur de Lys. And we've been to the others for comparison.
At Fifth Floor, we brought a bottle of 1996 Hillside Select-a fairly rare wine. We learned when we got the bill that the restaurant charged an additional $15 corkage (bringing the corkage to a whipping $50) for wines that they had on their list. We had another bottle with us that was a gift that evening, not on the list, and which we could have opened instead if we had been told about the additional charge.
When asked to waive the additional $15 corkage, the response was dismissive at best. For an additional $15, Fifth Floor lost two customers who eat dinner in restaurants every night and talk about their meals with people in the business. Not wise when the premium restaurants are seeing cuts in luxury spending.