It's not bad, nothing's a show-stopper, there's just several little annoyances and embarrassing security issues.

My example is that there's an empty blank line in the bottom of about half of my terminal sessions. I haven't looked into it, and I assume it'll disappear in a future point release.

I've waited for the dust to settle before doing the upgrade, and did upgrade one machine after another, but I didn't meet anything problematic, this has been a smooth upgrade.

I've waited a bit after the "root" security issue, and now I prefer to be on the latest version.

I havent had an issue with it. Other people have.

My choice is to avoid OS beta versions ^_^