I’m using it as my daily-driver since a few months and I can say it’s stable and enjoyable.
Consider that I’ve been using the unofficial Pie build since the beginning, so I cannot tell you how does the official build run on this phone.
Concerning the camera, OpenCamera seems to have some difficulties in shooting HDR photos, otherwise it works fine. It doesn’t support slow-motion and other “special effects”. To be honest, I’m using a custom build of the GCam application (I now, shame on me!), so I’m no expert about the default camera app.
In the latest build (my first) I encountered a strange issue with the timer application, which looks like is missing a translation.
Everything else is working really good, I have no reasons to discourage the use of /e/ on this device.