Overall, an excellent place to stay; IMHO, the location, parking inclusion, and the price are the top 3 perks.
I'd say the reviews are pretty accurate. The host is very responsive and willing to accommodate within reasonable boundaries, and the property is very conveniently located in a close proximity to just about anything you'd look for (e.g., beach, restaurants, and shopping) in Waikiki - all within walking distance.
For expecation management: the property is relatively dated, may not have all the amenities you'd expect from a typical hotel (e.g., toiletries and a hair dryer), and you may want to confirm the check-in time since it may be later than most hotels' you may be used to; understandably, the check-in time can fluctuate based on the host's clleaning crew availability but you'd want to coordinate well in advance if your arrival time is hours ahead of the check-in time.