Frozen Isle is located hidden in the Bank of America building, so if you try to find it from the street you won't have any luck. They have excellent frozen yogurt. The flavors taste great and the consistency is creamy without being too "icy". There are a lot of toppings to choose from and they let you taste flavors before you buy. It is serve yourself. The service is excellent and friendly. I come here all the time because I work across the street. They have a punch card program and they give two punches on Tuesdays. On par with what you would expect pricewise.
I did stop by the other day and it looked like they were closed (during a weekday lunch hour) which was kind of odd. I am hoping they haven't closed down for good!