Ranked in these QuestionsQuestion Ranking
Pro Multiple graphical environments will be supported (KDE, GNOME...)
Pro Purism designs their own motherboards
They are an SPC now. the goal is open source hardware and software including the BIOS (coreboot). The screen is 5.7 inches now, not 5 inches.
Con Hardware is not open as advertised
The freescale i.MX is a proprietary microcontroller so no open hardware here.
As you compare the specs with other smartphones.
Con Not available
Shipping starts in April 2019.