Have the PinePhone and PP Pro. Partial to SailfishOS on both. It has the most smartphone feel if you will.
Like with most the camera is pretty much a no go but I rarely use them anyway.
Just for tinkering so far. I have a habit of tossing the devices aside for long periods of time when an OS breaks badly. 😁
Technically SailfishOS handles most of the requirements to make the device a daily-driver-in-training. All but one of my Android devices are VoIP now. Getting away from carrier-based stuff (and saving money).
At the moment there isn't really anything usable on the mobile linux side (SIP, calls via XMPP - I have JMP.chat numbers) that I am aware of. On SFOS that is. Though I can use movim via browser.
Guess it is time I took the devices seriously and try to use them more regularly.