We are from Oahu and this is our second time staying in a Hali'i Kai condo and it truly is the BEST location in the Waikoloa / Mauna Lani area (in my opinion) and we've stayed at a number of the various properties over the last decade.
The reason Hali'i Kai is the best: the property is immaculate, the pool not only has a view of the ocean, but a full service bar & restaurant (although this was closed for most of our stay), and a full gym with also a view of the ocean.
The condo itself is modern, spacious, and fully equipped in the kitchen, with beach amenities (towels, chairs, umbrella, toys) and large, modern TVs. We also loved how quiet it was even though there were people staying next to us and below us, the construction is solid with thick walls so we didn't hear a thing.
The owners were also very communicative, quick to respond and very welcoming to their home.
We love Hali'i Kai and can't wait to come back!