I am a huge this app fan. I’ve subscribed for over a year. I have 3 units that fragrance my entire house. Better than any candle, spray, or melt I’ve ever tried. And the selection of scents can’t be beat. That being said, I am constantly, like weekly, having issues with the devices logging off or losing network connection. I couldn’t count the times I’ve had to re-add them on Pura , which is no quick task. Then I have to rescan the scents, which resets the fragrance level to high, losing all previously logged scent hours. I now have to frequently remove them, shake them, and hope that gives me a rough idea of how much longer they have. My other issue is that my monthly subscription often comes in multiple packages, at various times. Makes it impossible to do a housewide refill when I don’t know the scent levels. Ugh. Such an amazing product but so many kinks!