Hi William,
It has been around a month since I am using 2.0 on production.
There have been lots of issues, you can get some idea if you see my posts/discussions and tracker issues.
Splash is what I am using currently in spite of some issues it has which I have reported in tracker.
I can guess the reason why you are asking this. Before, you take the plunge, it would be advisable if you play with a production copy taking all the back-ups if it is a case of upgrade for you.
Manish.