I've been to Kona many times and I must say that the food is consistantly good. The sushi is exceptional as is the service. The Patio remains a staple place for Summerlin moms to get turnt. Always providing a fun party atmosphere. For a more subdued experience the dining area inside the restaurant is the place for you.
My only issue is with the restrooms. I don't know that I've ever used their restrooms and found them clean. They are always in need of some attention and are a constant source of dissapointment when dining at Kona. So much so that recently members of our party opted to leave so that they could use the facilities just down the sidewalk at Panera. That speaks volumes.