It is nice to be on the 21 floor and have such a view!
My husband was working for 3 weeks in Honolulu and I joined him the last week of his stay. We lived with open windows open to a balcony, as I don't like air conditioning. We got quickly used to the city noises below and had a great time. The kitchen had all we needed. Questions or needs were quickly answered and dealed with.
Take ear plugs just in case you have noisy neighbors. Twice, the appartement next door got visitors and if they hang out on their balcony you hear everything. We had a highschool boy team next door for two nights and could barely hear each other! We did close the doors to the balcony and used air conditioning for those days and it worked fine. But earplugs is a good idea just in case you are sensitive to noise. Just below is a nightclub with 80's music, it was funny to us and it does stop at 10 PM sharp, so it was no problems. Thank you Rick!