I totally recommend Barbara's place for a true experience of Kailua beaches.
It's super well located - it's close to the beach - you can walk to Kailua and Lanikai. At night you can go to restaurants, and sap a beer at Maui Brewing Co.
The place itself has everything you need: a big bathroom (immaculately clean), two big beds, with several big pillows, a small kitchen, and a pineapple in the fridge! Ahhh the pineapple!
The details count here and you'll be amazed at this charming studio! Don't think twice and book without fear! This was our first time in Hawaii!