Mark's place is excellently located if you enjoy the beach (<10m drive or within reasonable running distance) and want to explore the west side. Walking distance to a strip of great Asian and Mexican restaurants/shops in Sawtelle and if needed Walgreens and Trader Joe's within 15m walk. Multiple parks within walking distance as well.
The place itself is beautiful, lots of natural light and new appliances, and everything you might need (including tupperware, bakeware and shopping bags!) in the kitchen. The bed is super comfortable and balcony seating to enjoy the mid-day sun. Great place to relax for 1-2 people. Studios generally are difficult if 2 people are working from home and taking calls simultaneously, so this would be something to think about for future guests staying long-term. My partner is 6'3" and while he had to be more conscious of the ceilings near bed in the beginning, it was never an issue.
Highlight is Mark and his family, incredibly warm, super responsive, makes you feel at home. He's lived in SoCal for years so for newcomers (and natives alike!) he has lots of great LA and surrounding area recommendations, restaurants, hikes, places to explore in Santa Barbara, etc. I would without question stay here again and will be recommending to anyone visiting and looking for a great place to stay.