I have been trying this for about 2 weeks now in a concerted effort to quit smoking. I found it a bit of an adjustment for the first few days, and I was sceptical but it has proven to be quite effective. I dropped from 18 to 12 after 10 days and already feel quite happy to make my next order lower still. I'm looking forward to getting to the 0's. I'm also very happy with the apparent savings! My advice is get a couple of devices and have fun switching flavours (Cherry is my favourite so far).