Kona has an amazing happy hour. Its so amazing that you wont be able to get a seat, unless you are lucky. We tried going at around 4:30 pm on a Friday, and it took about 30 minutes to get a bar table, however we had to use our charming wives to get us the seat.
The location in Gilbert is pretty small, the happy hour is only valid on the porch. I have only been to this Kona once, and that was for happy hour. So I cannot comment on the majority of there food. We ordered some spicy tuna rolls and they were pretty good.
Overall, if you get out of work early go here to get some amazingly cheap drinks.