Upsides:
Aimee's apartment in Avalon was a wonderful "home base" for us while exploring the island. It was very clean, tidy, and stylish on the inside. It's fairly small in general, but perfect for two people who are planning to spend most of their time outside exploring the island. There front patio is also quite nice, and has some beautiful ornamental plants and a table + chairs to sit at for small meals. Aimee also provided a lot of support materials not only detailing the essentials of the apartment (such as wifi password and A/C instructions), but also with ideas and pamphlets for activities around Avalon. We didn't go into this vacation with a plan or an itinerary of any kind, so these were very helpful. I also want to commend Aimee for being so responsive and helpful if we had any questions, even though she was out of the country at the time we were staying.
Downsides:
It can get a little bit loud at bedtime (9pm -> 11pm) depending on what day of the week it is, but this didn't really bother us beyond the first night. In general, I also thought that it was a touch pricey for the size and amenities (there is, for example, no kitchenette or ability to make food of any kind). However, I can't really knock it for that too hard because that's a problem throughout LA County, not just this apartment or even Avalon overall. Additionally, we went during the summer months when travel to the island is more popular, so you can expect pricing to reflect that.
The bottom line:
The apartment was very clean, in a great location, and the host was extremely responsive. There is both indoor and outdoor space to relax between island activities, but expect to be going out to dinner every night unless you're planning to make sandwiches or eat microwaveable meals. We would definitely stay again if we were going to come back to Avalon, and I would recommend the place to others - however, you may want to do some additional research before booking to make sure you're getting the best deal if you're budget constrained.