YMMV, but I've found it really does work and isn't a gimmick. It gets problems right that Cursor, Roo, Windsurf, etc trip up on because somehow it finds exactly the relevant stuff for context at a granularity you can't really achieve by @mentioning whole files/directories in other tools. I'm going to enjoy it at least until something better comes along. I think the "relevant accurate context is better than just adding more context" approach is the way to go.

I find the autocomplete model a lot better than cursor/copilot as well. IMO it does a much better job of understanding the intention of your changes and generating relevant changes across files. I think that's also due to the context engine, it checks for relevant changes to the task at hand across files rather than being mostly "local".