Always Great!
Spent a wonderful weekend in San Francisco (2/24-2/26). I am never let down by The Four Seasons SF. Great Location. Clean rooms/suites. Friendly and engaging staff. My only dislike is that the in-room internet service is very poor, slow, and often unreliable. I have been staying at this hotel since it opened and it has always had the same problem. They should consider not charging for the service anyway. Beside this one issue, the property is terrific!
The Sports Club LA is located within the property and hotel guests have full access to the club. This is a fantastic amenity; the club is really wonderful. The adjacent spa is terrific and the hotel salon is equally as great. 
The hotel restaurant and lounge are pleasant and pretty good.
You really don't need to ever leave the property. But, let's face it, it's San Francisco, and there is so much to see right out your front door on Market St.
Point off for poor internet in rooms. This is tech crazy San Francisco, common guys, get with it!! Other than that - GREAT!