tl;dr - This place is great and you should absolutely stay here over some of the nearby hotels.
The communication with Geoff/Shingo was great. They were very communicative and were very clear with their instructions on how to check in/out. Shingo was also great at giving me some suggestions on things to do and things to eat. There are little signs and kind reminders throughout the apartment (though, not annoyingly so) which made it very easy to have an enjoyable experience.
The location is amazing! There is a lot going on in Waikiki and you're literally just a bloc away from the heart of it. Yet, somehow, this apartment was probably also the quieter side of Waikiki and faces the mountains which means that all the noise generated on the beach side, never keeps you up at night. Although there is parking available, you could probably still stay here and have an enjoyable time doing everything in Waikiki and not need a car at all. With that said, parking attendants were very helpful and in/out with the car was simple and there were never any issues. Just a heads up though, if you come back after 5pm, finding a parking spot will mean that you will most likely be parking on the upper floors (floor 4 or 5).
The apartment was very clean, very comfortable (especially the beds!!!), and very nice place to wind down after a day full of fun in the sun at the beach. The lanai was spacious and relaxing looking out into the mountains and the golf course.
I would absolutely stay here again and would highly recommend anyone else to do so as well.