Although I've eaten at the Piikoi Street location before, this review is of the brand new Kaneohe venue. For the address, go to their website.
As far as the food, service, ambience and everything else is concerned, this new location is every bit as good as the Piikoi store. There are two kinds of dining areas: the standard tables and the tables with sunken areas for your legs (rather than a very low table at which you have to sit "Japanese style" sort of with your legs crossed under you). This sort of "tatami room" at which you have to take off your shoes should be very reminiscent of being in a typical restaurant in Japan. This latter type of "private room" can be very nice if you have a large party, but when you have to share the room with a party of strangers (often with screaming kids...no one tells their offspring that screaming in a public restaurant is wrong) it takes away from the atmosphere a little.
One thing about which I have no complaint is the food. I've been to many Japanese "nabe" restaurants in the US and in Japan, and this food ranks right up there at the top. Last night all of us had the really superb beef sukiyaki, but on other occasions I've enjoyed their really excellent shabu-shabu, and both of these have been totally wonderful and enjoyable. You're provided with an electric hot plate and a large bowl in which to cook your food. Your server provided the two sauces needed to create a perfect sukiyaki and you set about to do the cooking yourself. For once there's NO WAY you can criticize the cook. I found the sauces to be excellent and the beef and vegetables were just right. I totally enjoyed the experience of dining here. I give it a hearty two thumbs up and give it my highest recommendation.
One more thing: if you're planning on having beer, be sure you get the "on tap" Japanese beer. It's really cold, crisp and enjoyable. They also have bottled Japanese (Sapporo) beer as well, but the draft Kirin was better.