Debian unstable is not really unstable, but it's also not as stable as Ubuntu. I'm told that when bugs appear they are fixed fast.
I ran Debian testing for years. That is a rolling release where package updates are a few weeks behind unstable. The delay gives unstable users time to hit bugs before they get into testing.
When I wanted certain packages to be really up-to-date I would pin those select packages to unstable or to experimental. But I never tried running full unstable myself so I didn't get the experience to know whether that would be less trouble overall.
when relays are blown
when power reserves fail
when life support is gone
gravity plating's pull is relentless
it will carry on