Penny's place was beautiful, overlooking a small beach with the sound of waves crashing below. the apartment is small (we traveled with our toddler and it was a bit tight squeezing his travel crib in, but not a problem), but well equipped with all you may need including beach towels, chairs and toys. Penny was extremely responsive, helpful and friendly.
The location is more rural, away from touristy Waikiki but still an easy drive to most attractions. There are some small homeless camps nearby but it is not at all a problem. We are from Brooklyn and very used to it, if you are looking for a more sheltered resort experience it may not be to your liking but we didn't feel unsafe or worried in any way.
Cons: there is no dining table except the bar table on the balcony, and we couldn't get Netflix to work. Neither of these things impacted our stay however.
Overall a great stay and we would recommend :)