We stayed at this hotel in early November 2012. From the word go we were made to feel very welcome. The rooms were spacious, clean and comfortable. Up on the rooftop, there is a room offering free tea and coffee. This is a very cosy place to retire to after a hard day's sightseeing. All in all, no complaints whatsoever about what I think is an excellent hotel located just one block from Union Square and the cable cars. It is a $10 taxi ride from the Ferry building where many tours start from. There is also a 24 hour diner a block down Mason Street called the Pinecrest where the food was delicious and reasonably priced.

My wife and I stayed two nights recently at the Donatello. We walked the few blocks to Union Square and then over to the indoor mall, which we found impressive. There were a great selection of small restaurants there. Our room was spacious and overlooked the street. We heard some loud noise from what was apparently a trash truck in the middle of the night and noticeable street noise began about 6 am. The curtains did a good job of blocking the ilght. The room was well equipped as others have noted and the bed was very comfortable. The heating/air conditioning system was quiet and efficient. The staff were helpful. We enjoyed hot chocolate from a machine up on the top floor, where there is a lounge, an exit to the outside with partial views of the city, and a fitness center. I thought the $28 daily parking fee was excessive. The desk clerk told me the hotel did not own the parking structure, which appears physically attached to the hotel. You can call in advance to have your car brought down when leaving; otherwise there may be a wait.

I stayed at the Club Donatello with a friend in June when I went to San Francisco for a conference. Having arrived for some time, I felt that the pictures on Booking.com didn't do it justice. I was so sorry I missed the Friday Cocktail which is organized for occupants as I left the very morning. My friend attended and she just kept going on and on about how lovely it was and how many nice people she met.The rooms are very spacious and very well kept.
I especially loved the division between the room and coffee/tea deck.
It is within walking distance of Union Square, China Town and many shops.
I absolutely loved my stay at Club Donatello.