When I stopped smoking cigarettes I done a ton of research on battery mods and I chose the Provari. It was very expensive but to this day it works flawlessly.It is large and I really don't like taking it anywhere.Just wondering how many people here have the Provari and are you happy or have any problems with the device? Mine is almost 8 months old and I really enjoy it including the ohm meter....Would like to hear some feedback from you all! I must purchase a v.v. mod. that is small when I am out and about....Thank's!