My take on this paritcular Kona Grill location:
Fantastic for happy hour - if you just want to relax and not eat anything too filling and have a few drinks, it's a great place. Especially if you've had a long day or are one of those funky people watchers, a table on the patio would be great for you.
For lunch or dinner - not the greatest menu, but the food isn't horrible. Just make sure you know what you're ordering and be aware that the portions aren't exactly generous.
Servers are usually nice, although i must say they have gone downhill in the last few years. I prefer the servers at Chandler Mall, but oh well.