I tried freeCAD a while back, I love the open source concept, but there were things that were just quirky. I have a small cnc machine shop and I mostly use Fusion 360 for my work, mostly because it just works.
Discussion
I don't know about using it for professional work. There are probably still pretty solid reasons for most commercial production shops to use more widely accepted solutions.
It would be a little bit like using Libreoffice instead of Word.
There are some things that don't work like I expected after coming from Fusion 360, but I'm not having trouble getting done what I need to like I did with SketchUp.
Freecad is awesome. If you have experience with Catia then it's pretty intuitive