I have been curious about those and kind of want to try one. Reminds me of these boards: https://www.reddit.com/r/ErgoMechKeyboards/comments/si320r/two_board_concepts_that_minimize_finger_movement/?utm_source=share&utm_medium=android_app&utm_name=androidcss&utm_term=1&utm_content=1. What do you think about it?