These have been around in Portugal for ages but never seen here till now, my friend there has used them for a few years and I did try one, they do take a little getting used to the flavour of course is different as they are made from tea leaves, but once you get used to them its great, was so happy to see them here s wanting to stop and these you feel you still had a smoke, at least they are less harmful and easy to use, the artridge goes into the machine once you press it 5 times it heats and beeps pop it in and off you go , it does only last about 5 minutes but that for me is fine, very pleased to finally found them here was going to get abroad but they cost a lot more there!