I loved my original Puffit and it lasted me over a year and a half of daily use before it bit the dust, which when you compare it to the amount of money I used to spend on cigarettes is virtually nothing.
I have also owned the Puffit 2 and that's a canny little vape and the same size as a real inhailer, unfortunately I had to get a refund as the heat sensor failed. I bough my Puffit 2 the moment they hit the shops/internet so I guess a few teething problems could be expected, I hear from my supplier that the problem is fixed and I will be buying another one soonish along with a MFLB too