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.