I just installed Atom.
My first impression is that it looks nice. But when I started typing, I found that the caret is a bit uncomfortable. I compared to other editors, then I found the reason: The caret will blink during the typing.
Usually in another editor or webpage, when I started typing, the caret wouldn’t blink any more. But in the case of Atom, it still blinks. Here’s a video that shows it:
You can start watching from 00:10, it demonstrates the problem quite well.