I stayed at Shelby's place for 5 nights. It's in a super location for Hanalei, Hanalei Bay and Na Pali coast. The king bed is very comfortable and wifi works great. There is plenty of soap for the shower, tons of beach supplies including towels, chairs and a boogie board. The kitchenette is adequate. There is no a/c which was worked ok for January.
The noise takes a little getting used to -- from the heavily trafficked road in your backyard, poolside laughter/talking (can't close the front slat windows), upstairs dogs barking, remote car locks, people talking, music, footsteps from above and roosters crowing -- oh and the power washer, edger and leaf blower -- eventually you give up. Fortunately, there is a fan to drown things out at night. Also, wearing earplugs helps. I never met Shelby but her husband came by and she was fast to reply to email. So, if you can tolerate a little noise, it's a good find for the north shore of Kauai.
To manage expectations, also keep in mind the rental needs many upgrades and investment relative to the price you are paying....prices are super inflated in Kauai.