Ljiljana and her son (Andrej) are super nice hosts with high flexibility in check-in/check-out and quick responses to any of my concerns. I recommend this apartment for a quiet stay (work or study). It is comfy and highly maintained, and you can find everything you need to make it feels like home. People with high standards of cleanliness (like myself) may struggle with the dust and spiders, but since all the tools and products are available, you can manage to make it up to your standards.
The neighborhood is very safe and quiet. La Jolla Village square is 10 mins away by walk, where you can find Starbucks, 24/7 grocery store and some good restaurants. UCSD is within 25-30 minutes walking distance and the bus shuttles stop is 11 mins away.