I stayed at Monika's apartment for 5 nights. It was a pleasant experience. First off, there are airplanes, just like everyone mentioned, but that was really not an issue. There are more of them at around 8-9pm, but at night I didn't hear any noise and was not bothered at all. The place was clean and nicely decorated. Check-in was easy because the key was outside in the box and you can actually arrive at any time and you won't need to coordinate the meeting with the host. Monika was also super responsive.
The location is on the main street - the 5th Ave, which is very convenient if you want to walk down the street and eat at one of many restaurants - though the neighborhood is located at the end of the street, or at least not central and hip part of it, so it would take like 5-10 mins walk before you reach the lively part of San Diego. There's a huge and very beautiful park right outside the apartment. San Diego zoo is close too. CVS is right across the street.