I haven't really been to any other serve yourself yogurt places, but I don't really need to after visiting here. They have a delicious selection of yogurts to choose from. The chocolate actually tastes rich and very chocolatty. The toppings are fresh as can be and there's a fun mix of fruit, cereral (Reese's!) and candy.
The staff there are friendly and helpful, if you need help.
Price is fine - it's about 5 bucks for a whole container of yogurt and some good toppings. Be careful not to fill your cup though, you need room for candy and treats!