After waiting months for the official app release I figured what the hell and opened up my brand new replacement Carta I've had sitting here for weeks on end to try again with the stock settings. Two hits off this one before the power button got completely stuck in the unit and it's now bricked. Not sure how it passed QC, I noticed the sticky button as soon as I turned it on. I was planning to sell this Carta to someone who could get the app working, but I'm glad I opened it as I can already imagine the PayPal dispute drama that would have happened if I sold this. I guess I'm just out $250 bucks on this one no matter what. I will never order another product ever again from VapeActive.com with their lame ass service. I definitely wish Puffitup would have had stock when I ordered, at least they'd work with me and maybe let me pay the difference for a Peak.