I tried two flavours of Skinny Cow ice lollies over the weekend and they were both very nice.
Toffee Sauce - Like a magnum without the chocolate shell, it was toffee ice cream with a swirl of toffee sauce in the middle. Really tasty, the toffee flavour was definately there.
Cookies and Cream - Vanilla ice cream with cookie bits in. Again really nice and full of flavour.
Both the lollies I tried where around 100 calaries and low in fat. Very nice and I recommend for a low calorie alternative.