YogurtBuilderz provides a good sized dining area with many choices of yogurt and toppings. I did find it a little difficult to locate when I attempted to find the building - it is tucked away in the back corner of a strip mall parking lot. It was dark, late at night and took a few passes around the parking lot to zero in on the location. The staff was very friendly and the place was busy even for a Sunday night. For the staff and selection I give it a 3 star rating. It was good, but I didn't find it any different than the growing list of competition.
I know this place is popular and self-serve frozen yogurt establishments are all the rage now. The economic model is great - you pay by the ounce and have your choice of any variety of yogurt and any topping available. Customers have the opportunity to build it as they wish, which allows those with specific tastes to have their wants fulfilled more so than a traditional store offering the generic selection of choices.
All of that in mind, I don't like it (the industry). Too many choices creates an opportunity for indecision and slows down the lines as people stand around wondering what to put in it next. For those new to the game, you can create something that turns out to be rather nasty - for example, the white chocolate sauce is really very sweet and I find if mixed with other toppings makes it almost unbearable. The other reason I do not like these places is that I do not like to pay for food that I then have to make and serve myself. I go to restaurants and pay for a meal rather than cook it at home because a) I don't like doing it and b) I am horrific at it. While frozen yogurt does not require much preparation, there is still some assembly required. If I am paying, I prefer to have it built for me. But I realize I am in the minority. As popular as these chains are becoming I wouldn't be surprised to see "FroYo" overtake "unfriend" as word of the year in 2010.