I love it. I have three new types of vape this year (FF2, GH and Crafty) and have been a long time volcano user. I need some more time with each to see how things shake out but the FF2 may be my favorite overall. The FF2 + Crafty, in particular, really compliment each other. It would be an epic battle between them, if I had to choose only one vape. The only downside I see after months of use is the unevenness to the extraction which requires annoying stirring. Otherwise, the FF2 provides the most enjoyable vaping experience I've had to date--even with no further firmware updates and even if I couldn't access the mobile app and had to use it stock, med-high.
I'm getting the impression from a few cases here that they are either overloaded or generally lacking in the customer support department. That sucks and I won't make any excuses for them. They need to resolve it and hopefully they will when they catch up on orders. Compared to the crafty and GH, the rate of complaints and failure seems incredibly low for the FF2. (For comparisons sake only. I realize that's neither saying much nor justification for anything.)
edit: great to hear
@b0