Jeff was very helpful and diligent to answer question.
My wife and I had a great time staying at The Donatello.
Location-wise is perfect. It's just two blocks away from Union Square. Walkable everywhere.
There's a bicycle rent shop right next door which is pretty convenient if you want to ride around San Francisco.
The hotel staff is very nice but the restaurant is way too expensive. Room service, don't even think about it.
On the bright side there are good restaurants close to the hotel though.