The froyo wasn't great, but the ice cream sandwiches were pretty good. You get to pick two flavors of cookie, 1 ice cream, and 1 mix-in topping (choc chips, pretzels etc). It's $6, and you can split it in two halves. (ordering the half for $4 makes no sense, just order the full sandwich and split it with a friend).
Personally, I thought it was way too sweet for my taste, but I bet the flavours are fine for most folk.