It just feels smooth, like if you were in a modern vim. In most other editors that attempt implementing a vim mode, something constantly breaks the illusion. There are some some little annoyances in zed, but they are mostly behavior differences you can get used to. And they are still working on it, so I really see it as a new imagination of vim with many useful features built-in, like TS-based motions, or the way AI edit predictions work doesn't break the vim editing flow.