I have been to the Kona @ Chandler and Scottsdale and never had a problem.  When I arrived at SanTan location and walked up to the desk the hostess just stared at us.... I fInally said hello to her and she asked how many in our party (super wierd and unfriendly).  Two of us ordered Moscato and one of us ordered Chardonnay.  We couldn't tell the difference between them.... The moscato wasn't sweet and the Chardonnay didn't really have any taste.  Our server was nice and our sushi rolls were fine... I've had better at the other locations.