It populates suggestions nearly instantly, which is constantly distracting. They're often wrong (either not the comment I was leaving, or code that's not valid). Most of the normal navigation keys implicitly accept the suggestion, so I spend an annoying amount of time editing code I didn't write, and fighting with the tool to STFU and let me work. Sometimes I'll try what it suggests only to find out that it doesn't build or is broken in other stupid ways.
All of this with the constant anxiety to "be more productive because AI."