From reading here I get the impression that the FF has a lot of problems. Everyone is complaining, fixing and returning...
Keep in mind that there have been a small number of returns compared to the amount of sales they have had overall. Sometimes it may look like 'everyone is complaining' when it really isn't the case. It's just that most people get vocal if their vape is malfunctioning, but keep more quiet if it works great. I don't consider it 'complaining' so much as searching for information about problems. For the amount of fans in this thread, I feel the number of problems is rather low.
As one of the people who had a return, I would hate to think you might decide against the Firefly because of the posts I made in this thread. I can tell you the following:
My RMA number was very low. They have not had many returns.
The process was so painless it was not an issue to me. I mailed them my FF on Monday, had a shiny new one in hand Friday.
Even though my Firefly was not performing optimally when I got it, I still loved it. I hesitated to send it back because even at its lower heat I used it a lot.
I missed having my FF immensely for the 4 days I was without it, and when I got the new one I found out that the FF is even better than what I originally had. I love the Firefly even more now.
Simply put, this is a great vape. Every person's criteria for what they want in a vape is different, but I highly recommend the Firefly if you think it will fit your needs. I would not be scared off by possible problems, and I'm someone who had one of those problems...