Jack was really helpful pre-trip when we had lots of questions. He was very detailed in the check-in instructions, and was also very helpful when it comes to giving us instructions on how to get around using public transport. He was very helpful without being instrusive just like what others have mentioned.
Location wise, this apartment is in a safe neighbourhood, that is both quaint and nice. It is also just 2 blocks away from Mission Street, which is full of food options. It is also a cheap Uber Pool ride to downtown (around 5 to 10 bucks depending on where exactly you are going).
The snacks provided in the room is a nice touch too :)
Would definitely stay here again when I am back in San Francisco!