Simply Awesome. I first went there when they opened in Sun Prairie. I loved it, but I didn't think they would last simply because almost nothing does. A few years later they are here and going strong. I have had just about everything on the menu and I have never once been disappointed. Especially with the dolmades. I'm a sucker for dolmades.
If you want a light atmosphere in a cozy restaurant and the finest Greek food in Southern Wisconsin, go to Atlantis Taverna. We go every couple of weeks, and when a kitchen experiment fails, it's off to Atlantis for some food.
Do yourself a favor and stop in, try a sampler plate or a gyro, or the spanikopita. Anything. Your tastebuds will love you for it.