Received as a Christmas present from my husband to help me quit smoking, started using it the very next day. It took awhile to get use to it and the sample flavors were o.k I only liked 2 out of the 4 which was fine. By week 3 I found cucumber flavor which worked great for me then it just died gave me a bad taste in my mouth the died, it does nothing now. Just as I was getting it boy did that suck. And because it was a gift I have no proof of purchase so no warranty. I did however purchase another one hopefully it last longer than 3 weeks. If it lasted longer I would have given it 5 stars this is more like 3 and a half not quite 4