Yeah its a specific penetrant as opposed to a general purpose degreaser / penetrant. It works very well, Id definitely recommend it. Used it (along with heat) to get out two stuck exhaust manifold bolts and a rear spindle.
Needs a little attention when cooking but very simple to use. Just fed myself for 4 days on Dartmoor using nothing but this to cook. Buy two and have more than 1 'hob'! Excellent value for money, seconds to set up and works well with dry wood.
Literally folds down and fits in your back pocket like a wallet in its neat velcro case. My mate bought the bigger version which is equally as good though slightly too big to go in a back pocket.
Awesome product and a great idea, very neat!