I've have a genuine Omega from Altsmoke. I got it in a trade a long time ago. It's an all mechanical design, very well built, and reliable. What I don't like about it is that it isn't pocket friendly as the top is easily pushed down when I put it in my cargo pants pocket which activates the device. Juice also slowly leaks into the contact area so you have to take it apart now and then to clean it, kind of a PITA that I don't want to mess with. But it's still a good unit if you don't mind those drawbacks.