It sucks. It produces almost no smoke, the cartridges that they claim "contain as much nicotine as a pack of cigarettes" last for 2 hours of intermittent puffs, the thing decides to start "cleaning" itself regularly after about a day, and the battery runs out way too fast.

It's a good idea, I think, whose time has not come yet.

* Disclaimer: I bought 2 different kinds. Smoking Everywhere and Smoke Free. Smoke Free was better in that it was actually the size of a cigarette and produced more "smoke" (vapor), but they both sucked so bad I was back to exclusively real cigarettes within 4 days.