I like that it's free for personal use only (no business version).
It has all of my favorite features from other editors such as syntax highlighting or auto-completion which makes coding so much easier! Some things can be improved though but nothing majorly bad about this software at least not yet anyway haha :D The interface could look better maybe some customizability would help too? Maybe an option to change colorscheme etc.? But overall great tool!! If you're looking into using any kind if code editing app then definitely try out yi first because its very easy enought even beginners will have no problem learning how yo edit their files :).