re: Best 5star hotel in San Francisco?

i have stayed at about 50 places all over san fran. I really like the westin on union square. The rooms are really good and bourbon steak is freaking awesome. The W is also pretty good. Four seasons is sweet too.

if you want nice, you are best staying near moscone. It will be far from most of the sites but union square and the embarcadero but the hotels outisde this area are mostly tourist class.