Will be full of bugs and that anyway...
I don't honestly think so - there will be bugs of course, but not as much as your thinking.
What errors did you have, i havent seemed to have any..,(yet! )
Well the one I mentioned above (tab glow effect), it crashed on me a few times, it wasn't compatible with half of my add-ons, none of my themes worked and it seemed a little bit slower - it just didn't have a smooth feel to it.
I know why the add-ons and themes didn't work - because it was an entire new version. But that's something no one can really help