Are they any better than the default
open source driver?
They offer better performance, power management. But they also contain more errors and are less likely to be improved in short intervals of time.
Are they worth enabling?
If you're unhappy with graphics performance, cetrainly. If you are quite happy with the current situation, you wouldn't gain anything from enabling them. But you would potentially expose yourself to a few new bugs and errors.
They have improved a lot. And there is not big disadvantage to enabling them. But if you are happy without them, save yourself some potential trouble.
They have improved a lot. And there is not big disadvantage to enabling them. But if you are happy without them, save yourself some potential trouble.