I see FreeCad as the perfect solution for a startup with limited resources that want to save as much as possible and doesn't mind using non-standard 3D CAD software, i.e., it's not required by customers to use specific software for compatibility. It's perfect for hobbyist use and makers who don't care about brands and pay monthly fees. I see it as very well suited for small businesses that need FEA (finite element analysis) and can't/don't want to pay huge amounts of money for it, just like us. I see FreeCad as less appropriate for big corporations or well-established businesses that need standardized solutions, compatibility with clients or good version management. Don't get me wrong, it can get the job done, but it will be much slower than state-of-the-art CAD systems.
Usability is awkward. Perhaps if you learn it as your first CAD, it will feel OK. Still, it comes from commercial CAD products like mine (Onshape, Solid Works, Inventor, Solid Edge). You will feel it is less intuitive, with a less polished UI, difficult to customize and, this is a subjective one, less serious. I'd love to see it improve the usability and UI. I believe the engine behind it is powerful, but how you interact with the software is still lacking.
Freecad is used often when receiving files from multiple sources and the need to work with cad in various forms from meshes to solid cad. Often when receiving scans of 3d objects the format is easy to work with and convert to traditional cad later on. There is no other cad that can bridge the gap between all the cad formats that we found yet.