My nautilus has had a tricky switch since I got it. It clicks like it's suppose to, but doesn't always make contact, I always had to hold the button to one side or the other, a few days ago it quit altogether. It never got much use because it didn't vape like a 6 volt device, until the other day when I got it to work for a few hits and wow just like my other 6 volt devices. I sent a pm to Schreck and he had me send it to him for repair. I sent it off yesterday. I should have sent it back when I got it, but I didn't use it much so I kept putting it off. If it comes back rockin like the other day I'll probably purchase another, this time a Sabre 510. I haven't heard of anyone having any problems, so I'm probably the only bad switch in the bunch.