Congratz! Mine also arrived this morning.
The build quality is awesome imo. Even a bit better than on Pro¹.

Make sure to backup your persist partition.
It holds the device specific keys so stock android can do advanced auth things. SafetyNet still works. But those auths that check the device keys will not if you loose the original.
Tested for you
I manually flashed the persist image that was delivered in the stock EDL flashing files. To fix the sensors which where altered by sailfish os. That worked. But i should have done this with a persist backup from my device from before the sailfish flash. Since the stock persist does not contain the keys.

Even if you don't plan to use android. It might raise the resale value.