Because I couldn't justify spending yet another £60 for a Psion 5 which soon breaks down, I run Epoc Agenda now on my Windows PC on an EPOC emulator, and it's great for keeping track of events.
Github: https://github.com/semiprime/pygenda Demo video: https://www.youtube.com/watch?v=uvQqFmlZ6nM
If you liked the S5 agenda, I'd appreciate any feedback you could give. (Video shows it on a Gemini, but I also run it on my Linux Laptop. Running on Windows is probably possible, but I haven't tried it, so you'd need to do some fiddling - in particular installing GTK3).
(I've not used it. I've seen people complaining that it's not very good, but people always complain on the Web, so that's not much of an indicator of anything.)
The keyboard is pretty good although not as good as I would have expected given the ravings about it.
I should probably open it up and re-enforce the cable but I'm a bit afraid of messing it up in the attempt.