Wow - a beautiful apartment - in an amazing neighbourhood. Fully equipped with everything you'll need - a real home vibe (spices/teas/oils etc). We added to the tea collection - so enjoy a brew of "Yorkshire Tea" if you stay! Very clean - with an amazing bedroom (huuuuuge bed!).
Lots of great food options locally - and interesting shops (the thrift shop two blocks up on Polk is an Aladin's cave of bargains).
Public transport dead easy from here too. No1 bus runs outside right down to the Ferry Building (we used it at 5am for a boat ride up to Napa). Great walk across the GG bridge to Sausalito (and there's a bus that runs all the way back to one block away on Van Ness).
And finally - I was in SF 20 years ago - and heard all about the latest problems with homelessness and crime. Honestly I thought things were *better* now compared to then. Felt very safe (obvs common sense about keeping out of Tenderloin). It's a beautiful city - we filled 5 days easily.