I like that fact that it's minimal and it ties directly to Git.

Love the interface and the packages for native language support. I generally code in Python and the worst part for me is to manually check for indentation. Atom fixes it for me automatically.

I can use it for note taking, drafts of code snippets, and it helps me organize thoughts on a subject before I get into an actual deck or doc. It saves everything and can connect to your GitHub repository.