Oliver's room is very nice and clean. It is part of a whole building that consists of several AirBNBs which is why I didn't get to meet him in person. However, it was very easy to contact him via AirBNB and he was very helpful and even contacted me several times by himself just to make sure the check-in and everything else had worked out fine.
More importantly however, the building has a great location. Taco Bell is just across the street, there are several small grocery and liquor stores nearby and you can easily walk to the beach within 20 minutes or even less if you walk quickly. Oliver also gave us a parking permit that allowed us to park right in front of the building without having to pay anything extra. There were also plenty of parking lots available in the street.
There is a small fridge in the room and the room has its own bathroom which is complete with shower gel, shampoo, conditioner etc.
The only small disadvantage of this place is that it does not allow you to sit outside in the evening since there are neither benches in front of the building nor is there a porch or anything else comparable where one could finish their day.
Nevertheless, since the beach is close and the whole area seems safe, you can easily stay on the beach until late to have a drink and hang out with friends and then walk home to go directly to bed. I really think this is a great choice if you are planning to go to Santa Monica and want to save some money. It is really worth it!