fantastic hotel in the tenderloin...
had such a great time at the Cova! from the moment we were met by the friendly desk clerks until our departure everything was fantastic. the rooms are super cute and stylish, clean and modern. and i seriously don't even require that a hotel staff be friendly since i am a super i am an autonomous type of traveler, but with that said,the friendly and helpful staff just added to my terrific experience. 
about staying in the tenderloin...if you visit a city that you are not familiar with, you should really do some research before you book a hotel. are there an abundant number of drug addicts and homeless people in the vicinity of the hotel? the answer is yes. but unless you plan on hanging out on the streets 1/2 naked while flashing money at people, this shouldn't be a problem. the hotel can only be accessed by the the guests and staff after 10pm and this includes access to the front entrance as well as the elevators to the rooms.
even though i usually don't take advantage of hotel continental breakfast, i decided to see what the Cova had to offer. i was impressed with what the hotel provided. according to my SO, who travels for a living, their continental breakfast had more to offer than the average hotel. he liked that it was on the 8th floor with a 360 view and had a communal vibe. he also liked the outdoor seating. 
we had so much fun out and about in the city the night before that we wanted to do something super low-key our second night at the hotel, so we used the hotel shuttle to go to the Fisherman's Wharf, which we wouldn't have gone to otherwise. the hotel's shuttle driver was super charming and he looked like a Cambodian Johnny Depp (21 Jump Street-era) so he was also easy on the eyes and nice.
I highly recommend the Cova!!!