tl;dr: Just book this place. You won't regret it.
I really can't recommend this rental enough. It was the perfect spot for my fiance and I during his first visit to Hawaii. We were close to all of the major shopping areas along South Kihei road, but just far enough from the action that we didn't have to deal with all of the noise. We were also on the bottom unit, so bear in the mind that you might hear people above you. It didn't bother us though. Beaches, restaurants, and shopping were all so close to us that we didn't leave Kihei for the majority of our trip. It was all just. right. there.
The unit itself is nested toward the back of the complex, which meant for quiet nights and restful sleep. Other people have noted that the space itself can be fairly dark, even in the daytime, but that also means that you're not baking in the tropical heat. We only needed the AC in the evenings. The unit itself also has everything you could possibly need and more for your stay: beach towels, snorkel gear, washer/dryer, immaculate kitchen, TV with streaming services, etc.
Last note, Christina was unbelievably kind and responsive to any questions or comments. We had some questions during our stay but Christina was so fast to respond to us and worked with the building management (over Thanksgiving!!!) to make sure all of our needs were taken care of. I would rebook in a heartbeat.