I bought a couple to to see if they are suitable for beginners. I thought I had a dud one when it gurgled and spat and was generally useless but it turned out it was the coil. I am not sure about them and I'm probably more likely to recommend an Ego AIO. Their size factor is a major plus for smokers though and the automatic firing is more familiar for smokers. The liquid seems to last forever and they hold their charge well.