I, too, love it.
The design has fixed all the problems I had with the Gemini: the keyboard is excellent (the backlight makes it usable in the dark, which the Gemini wasn't), the camera is considerably better (not difficult), the hinge is much improved (much more solid to type on; the Gemini bounced a fair bit when pressing keys and much harder to bite yourself with), and the CoDi is useful for seeing who's calling you. NFC is great, too: mobile phone payments just work, although you have to open the lid.
I've only ever had phones with keyboard (Nokia 9210, 9500, E90, Samsung Galaxy S Relay) -- never owned a touchscreen-only device -- so I can't really say how much of a difference this is over one of those, but the UI copes quite well.
Bad bits: battery life is astonishing; I sometimes manage an entire day. The CoDi is broadly useless for anything other than seeing who's calling you: I find it far, far to slow to respond, and the notifications icons disappear quite quickly. Call quality is fine. USB-C is OK; I haven't used it for anything other than charging, but both ports seem to work for that. The Gemini handled rotation much, much better than the Cosmo does. Even with rotation control apps, the Cosmo can feel a bit clunky, and there are some things which just don't work: Google Calendar really needs portrait, but forcing it means you can't add a title to new events, as the title field loses input focus when it rotates about.
All in all, I expect to use this thing until it dies. It's excellent, as I hoped it would be. The delays in manufacturing and shipping are unfortunate, but I wasn't in the slightest bit surprised by them. I backed early -- number 601 -- as I'd got a Gemini and could see the problems with it, and the Cosmo appeared to fix them. It's done that rather well. I will confess to being somewhat uncertain with the Retro Computers debacle and Janko Mrsic-Flogel's involvement in that and PC, but when the Gemini shipped I felt the risk was probably fine. In sum: buy one.