I use it for Go exclusively because of go-plus but I would never use it for anything else. Those extra 20ms when scrolling, typing, etc are very distracting to me.
Go fmt, linters, etc all run on save and that's great for me.
I've been using a fork of fresh[1]. I haven't found a single issue yet. I simply cd to my project and run it.
Not sure about Atom, it felt slow when I tested it, just like other web tech based IDEs.