Betsy's place was very clean, comfortable, and nicely furnished. It was about as close as you can get to the beach without paying "on the beach" prices -- 140 steps from the back gate.
We snorkeled with sea turtles every day, and the fish were beautiful as well! The beach isn't "groomed" like many of the more pristine beaches on the island, but the fact that there were rarely more than a dozen other people on a pretty vast beach at any given time made up for this.
The waves in August were much too small for boogie boarding, but nice for floating and snorkeling.
Be sure to ask for extra fans, as there is no air conditioning and the ceiling fans do very little to move air. We were a bit disappointed that the grill was "communal" and not on the deck, but rather below in the yard, outside the studio rental. It was a small Weber charcoal grill, so a bit small to cook dinner for 4. There was no cooler provided, which would have been handy a few days we ventured out.
A maintenance man came to replace window hardware during our stay, which we found a bit intrusive and inconvenient -- he was perfectly nice, but we didn't feel comfortable leaving the place with all our belongings while he was working. While necessary maintenance was addressed in the terms of the rental, this work was not "necessary". The windows were functional before the work.
We were awakened multiple times every night by nearby dogs howling and barking. There's a very close neighbor with at least 4 or 5 dogs that seem to howl and bark at the slightest disturbance. Given the heat, it's necessary to sleep with windows open, so you really can't avoid the outside noise.
All this said, I'll reiterate that Betsy's place was clean and comfortable, and situated in great proximity to a lovely, quiet beach where you're sure to see turtles every day. Haleiwa is a fantastic little town with great food and fun shops. It's a town we would happily stay in again!