I bought the Penguin a few months ago and if all the ones I’ve tried this is my favorite. Only one problem- most of the coils burn up so fast it’s not really worth it. Occasionally I get a good one that will go a week or more, but most of them don’t last two days. It’s a good thing they are cheap. I’d hate to give it up but I’m getting really frustrated with the coil issue. I wouldn’t recommend it until they figure out what the problem is.