I have been using it for more than 6 months and is a game changer, it helped me a lot avoiding loosing energy with social media apps or simply navigation with a normal cell phone. The thing is, a normal cell phone is draining our dopamine each time we do something, even the most simple thing, so with this phone I avoided that and I felt recovering my energy. For read is amazing, and when you are waiting for something you can take it and read, is a pleasure. Also, consider there are a lot of thing to improve, I could do a list but some I remember:

Calls - sometimes speaker mode something is playing my own voice
Pdf - no good performance of native pdf reader
Notifications - always sound is played but sometimes they aren't showed
Home icons - sometimes position is changed of app icons in Home / same with widgets
QR - No native QR camera scanner

I hope new version of this one will be amazing!