I installed the VSCode and PyCharm CoPilot plugins, and signed in with my GitHub account (you first need to request CoPilot access and wait until you get it).
As you type in comments or code, CoPilot will sometime autocomplete up to about 10 lines of code, based on the content of the file you are editing (maybe just the code close to the edit point?).
My other tools? I use LispWorks Professional, Emacs with Haskell support, and sometimes IntelliJ. I work a lot on remote servers so I depend on SSH/Mosh and tmux also.
For me both are true. The suggestions are usually annoying and wrong, however sometimes copilot makes an observation that is non-obvious, i.e it suggests code that makes me realize that I was about to write a subtle bug. I keep it on as a sanity check.