I split my cash on yogurt and bubble milk tea. I've had better bubble milk tea, especially for the price (~$4) but those places are not an option in Champaign. Same with the froyo. The atmosphere and friendly staff puts it over the top. Good as an alternative to an ice cream or coffee shop, unless you were hoping to sit down and work.
In NY or SF, where the competition is more intense, Cocomero is more like a 3.5 - 4 (due to price and quality), but it's solid 5 here in Chambana. Just wish they served a modern selection of bubble milk teas.
My memory is fuzzy on this, but I think there's a $3 minimum on credit card charges. At 47 cents an ounce, that's just under what you might expect to spend on a typical serving (halfway up the smaller bucket).