I conduct marine research that involves lost of scuba diving, so I rent a van from Kimo's every time I visit Maui. The cars, while often beat up, have always been 100% reliable (usually with working AC!). I appreciate having a vehicle that I can load scuba tanks and gear into with no problem, and I love that the cars blend in with local vehicles and don't yell "Hey, look at me! I'm a tourist!"
We had a very good experience with an SUV from Kimo's. The car was in good shape, and it was a nicer and larger vehicle than we would have gotten from one of the big rental companies, at a somewhat lower price. There are some details that are important.
Plusses, it's great to drive something that is not obviously a brand-new rental, though they did have a Kimo's sticker on the back. We got a better car for less money. And we supported a local business.
On the down side, we had to shoot photos of some bumper scratches when we picked the car up, they had us use a steering wheel lock as extra security, and there was no remote on the key, so locking and unlocking was a manual process. We paid for airport parking both arriving and leaving, which added about $25 to the cost.
Great service! We chose the older model option, and was given a Toyota Corolla. The car was waiting at the airport parking lot for us. It was easy to call the number and get the codes to get the keys. The car was clean and in good shape. The windshield wipers though only worked on the highest setting. When the wipers were cut off, they would not return to the bottom of the windshield. They stopped wherever they were at, and it was frustrating to get them back down. Minor flaw. Overall though a good experience. Dropped it back off at the airport when we went to leave and placed the keys back in the lock box.