My current main: Kyria, wireless, with choc thumb cluster
*(Image description: A split keyboard with weird keycaps. Also pictured: big ploopy trackball, pocket knife, he/they and no terfs buttons, crab deskmat)
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Caseless and plateless Kyria with nice!nanos, SA8010 keycaps, and a choc thumb cluster inspired by the Pinky3/Pinky4, tented with splitkb pucks and manfrotto mini tripods.
I find that with the choc thumb cluster, this setup is ergonomically very close to my similar layout keywell board. (TBK Mini)
The Ploopy is neat, and I find the shape very comfortable for my hand. Programmability is nice, but definitely requires building in QMK in my opinion, firmware setup out of the box doesn't really take advantage of drag-scrolling well, which is the best part of it from a UI standpoint.
Ergonomically, I find that I have to basically give it high heels with very tall stick-on feet, raising the back of the ploopy way up in order to keep my wrist angle neutral when resting my hand on the device.
The bearings are okay, but some folks use a modified shell with "ball transfer units" which will be much nicer to roll on.
I think it's very funny that it uses a USB-B connector. (Certainly better than micro!)
When I switched to my first columnar stagger board, it took me a few weeks ish to get comfortable with it. This varies a lot though from user to user and depending on what sort of stuff they're typing and whether they have any "bad" habits like typing b with their right hand.