Everything is great. Just learn how to use the thing. Firmware is so much better now than a year ago it's ridiculous. You can actually use a whole battery, and you have two! Perfect clean hits every time. Easy upkeep. Dry and concentrate. Seriously.
I don't know where the bad reviews are coming from. The Firefly 2 is the best investment I've ever made. Conserves so much product, saving me hundreds of dollars in the long term. App works great.
Since the update, the app has been a lot better. Same goes for the overall user experience. Being able to set temperatures without the app, having actual temperatures inside the app, better vaping performance, etc. My only two gripes with the device (not the app) are: 1) The battery reading is incredibly unreliable. One moment it blinks blue twice, but when I try to take a hit, after a few seconds it blinks red. 2) For some reason, if the device is slightly cool (using it outside or just lying in a room that's not warm), it takes many tries to finally get a hit. It will start heating up, and then blink red after a few seconds. After many tries it will finally stay on for a whole hit. Once it's warmed up like that, subsequent hits are fine. But it's an annoying user experience.
Battery issue has been broken yet again... Start it up, says half battery, take a single drag and it blinks red, then the battery catches up once it is dead. it will tell you it's full or dead, nothing in between with any accuracy. Considering battery monitoring is a feature, and it's broken, it doesn't sit well considering the premium cost.
I bought the Firefly when it first came out and it was great. Now since the update I get the perfect smoke Everytime and I can totally customize it to my like. Love it.
Asks to turn on Blu tooth everytime. Blu tooth is already on. Says turning on Blu tooth and just sits on that screen indefinitely. Tried turning Blu tooth on and off along with airplane mode on and off. Useless.
Minor bug fixes.