Hey bud ... No issues at all. The fire button is somewhat recessed and the spring I've got in there is the heavy one, so takes a bit more to get it to make contact and fire. Easy to do when you holding and Vaping, but in your pocket, nah ... Never had a problem!
I absolutely love it. I believe a 24mm is releasing soon as well
thanks @Naeem_M....gonna check out the specs on the new tanks and if 24 wait for the new one