Every year I order my cake from them--usually the Swedish princess cake, but the pink champagne cake was great for my 40th (it was huge). Their pastry cream is so delicious.
Expensive, but worth it. I love the coffee cruch cake from Sweet Spot on Buchannan/Sutter - but you gotta be fan..maybe a native?
Love the red velvet and carrot cake!
the ice cream cake (secret breakfast, blue bottle coffee) is my official choice for SF birthdays