Let me preface my comments with the fact that I have REALLY high standards.
Cleanliness: Overall, not as good as I'd hoped it would be for the price we paid. The house itself is pretty worn out. It's an older home that they've tried to make as updated as possible, but there's a pretty significant "musty" smell. Rugs were matted and dirty. I think they could update a lot more things especially for the amount that you're paying for this place. There was also hair in the shower and left over razors.
Communication: Very responsive and quick to answer questions. The manual they provided does need a little updating though. There's a couple items in there that aren't accurate and we tried a couple of their restaurant suggestions and they were both bad. Don't go to The Promiscuous Fork. Not good. You're better off just using google.
Amenities: For being a beach house and for having a pool, I was surprised to see they don't provide more items, especially water toys. We had to go out and buy a bunch of stuff for our toddler. There are a few buckets and shovels, but I would even guess that those were left there from previous people. We left all the toys there that we bought: basketball, water football, floaties, etc. So hopefully that's helpful to the next family that stays there. But they do have plenty of towels and provide soap and shampoo.
Pros: The pool is great and the backyard is very relaxing. That's where we spent most of our time. The location is awesome. Super close to the beach and downtown La Jolla. The neighborhood is also very quiet and feels very safe. The house has plenty of space for quite a few people to stay.