Very low in calories, but not a filling as your normal kind of crisps. They can be quite addictive to eat, especially when you have a giant box of them but pace yourself. The acidity of the vinegar burned my lips after a few packs and I had to put them away for a while.
Why do so few shops sell Salt & Vinegar French Fries in single packets these days. The only way to get them seems to be via multipacks but then I am left with a load of Plain and Cheese & Onion that nobody in their right mind wants to eat. It has got to the point where if I find a shop that does sell them, I end up buying 5 or 6 packets at once. We should petition Walkers! In the meantime, I now buy them by the box load. The only problem is that I end up eating about 5 packets a day just because they are there.