Back in April I wrote a 'first take' review of the Gemini PDA, a clamshell Android device that takes design inspiration, and some software smarts, from the 1997 Psion Series 5 -- a fondly remembered Personal Digital Assistant (PDA) from the pre-smartphone era. I still have a range of old Psion kit, and the Series 5 comes out of its box to play now and again. It still works, and I can still produce words with it.
Gemini PDA: A long-term evaluation of the reborn Psion Series 5 at ZDNet