I'm sure plenty of people had no trouble -- but personally I bought one after a shoulder surgery hoping I could use it to type without having to move my hands together, and I failed to ever get to the point where I could comfortably type with it. After trying for a couple weeks, I bought a Keychron Q11 QMK -- this is also split but with an otherwise standard layout -- and had no issues learning it. I actually still use it on my primary workstation even though I can physically use a normal keyboard.
Yeah, staggered rows of keys is what my muscle memory knows and whay I wouldn’t mess with it. Maybe for new generations who don’t want to wear our baggage but are these standardized yet?
A week or so. I regularly use normal keyboards and moonlander and I struggled with it. Too difficult to go back and forth throughout the day. Use a laptop regularly as well. Love the programability of moonlander but not worth it for me since I still need to use regular keyboards on a frequent basis. Wish they paired their software with a normal keyboard layout. Went back to regular qmk mechanical keyboards.