I spent about a week recently learning some of Freecad.
It is a very powerful program and i found it to be a steep learning curve.
It plainly says its not production ready and there will be bugs. I found quite a few which made using it very tiresome.
As i was only doing simple stuff i switched to Sketchup, which is great and a lot faster for the stuff i wanted.

Freecad has the potential to be very powerful and useful , hopefully it will mature soon.
I dont' have much experience with commercial 3d cad so couldn't say how it stacks up against the likes of Alibre & solidworks etc.
I'm certainly going to keep my eye on it.

Cheers
Greeny