So I've d/l'ed the GOG patch, which then allowed the updater to work and it's at 1.0.4.

The random crashes seem to be gone.
The total pause/freeze from both battles and overworld map arn't happening anymore.

If you were waiting to buy it till it was stable, it is... go for it! :-)

On the downside, most events are still just an annoying resource drain.
The ai still takes up to 15 seconds to make their turns, when doing a lot; usually far less.

For amusement
http://www.quartertothree.com/game-talk/showthread.php?68619-Masters-of-the-Broken-World-Turn-based-strategy-fan-s-wet-dream&p=3372354&viewfull=1#post3372354

I've seen 1.04 still crashing during battles. My colleague isn't happy. As for me, until he can't play, I'm not buying.

I still have random freezes witth fourth patch, so, no, the game is still not fixed. But it had 4 patches in a week, so I'm confident, there is a very reactive team and it's good news.

As far as I'm concerned it's still too buggy to be worth investing time in a campaign, and it's inferior to Genesis in almost every respect.