I think therefore I am: Agree or Disagree?

Descartes spent a day deeply thinking about all the things he believed, and that which he could doubt. Eventually he came to a single thing he couldn’t possibly doubt.

“Cogito ergo sum”: “I think therefore I am”.

I tried the same experiment (for a much smaller amount of time), and it seems to me that, the thing that is thinking isn’t necessarily “me”. I don’t think I have full control over everything I think, in other words. I may not be the “thinker” writing this at all!

There does seem to be an observer, without opinion and thoughtless, quietly observing it all in the background. I “think” that is what I REALLY am, although I have no idea what it is!
Some kind of Buddhist ‘Ultimate Consciousness’ type thing I suspect.

Anyhow, I am interest in your opinions.
I think therefore I am: Agree or Disagree, and why?