I sampled two boxes of nairn's oat biscuits: mixed berries and stem ginger. Both had great taste, and a noticeably lower sugar content than other traditional cookies. These were more filling than fattening, I'd say.
Although I am not gluten-free, I recognize that consuming huge amounts of wheat can have a detrimental effect on the digestive system (you can read more about it in the book "Wheat Belly") and thus I limit my wheat intake. These cookies helped!!
I'd definitely recommend them if you're looking for a filling snack that isn't overwhelmingly sweet or calorie-dense: I've been crumbling my cookies in plain yogurt, smearing peanut butter on them, etc etc. The cookies are plain, slightly sweetened with nice flavor; the stem ginger flavor has a really nice tang to it! Take a look at their website for recipes and where you might find a local stockist: Nairn's Oatcakes!