Earlier quoted context omitted.
Have you had RSI issues? Do you use it with the default keybindings? I've tried it a few times but the default keybindings seem unnatural to me. Not that it's Emacs fault, considering the keyboards they used back then.
For a long time I was unaffected, until I started using emacs more. This was resolved by switching to an ergonomic keyboard where I put all the modifier keys on the thumbs which resolved this issue (but made single handed typing of eg C-V or single words a bit annoying)
It's helped (but not completely alleviated) my RSI. Absolutely worth the price for me though given that.