Tried them a few years back when I was in Bristol and they were a cut above the usual high street brands. Oddly, I order them via Amazon (as they're not available where I live) and give away several packs to a friend who lives in Gloucester ... where they ought to be readily available, but aren't.
Actually has salt on them, unlike so many other brands. Quick aside - the body is very very good at processing salt. The issue about salt causing increase in blood pressure is true in RATS. Its because rats can't sense salt in their water. And if you give several teaspoons of salt to a Rat then it will cause a rise in their blood pressure. There is a some evidence of a reaction in humans who have high blood pressure - but the effect is very slight, and their is no evidence for people who do not have high blood pressure. Of course if you take the same amount of salt per Kg body weight the rats were taking, then yes your blood pressure will go up. And if you manage to eat several kilograms of salt at one sitting please record and post a video of you achieving this feat. Also if your starting on a low carb diet (your presumably eating this as a treat) you need to increase your consumption of salt significantly!