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.
SketchUp is great for individually studying options for building design. It is an awesome conceptual tool to be able to quickly model and manipulate a building to study different designs. It is not good for complex geometries, especially curves. Surfaces have a hard time registering and cutting into one another. It also eventually needs to go into Revit to be more realistic as it is not good as a documentation tool
Quickly exploring solutions in 3D: We get a lot of "what if" and "what would that look like" questions. While hand-sketching and hand-drafting can be fairly quick, SketchUp allows me to quickly create 3D and 2D views of a detail or solution, change dimensions and materials in a flash, and show a client or installer the plan in minutes.
Creating professional design documents in LayOut: Projects of any scale need good documentation. Using a combination of SketchUp and LayOut, I can create a Design Intent Set, plans for permitting, a set for mechanical trades to mark-up, etc. Having clear, appropriately-scaled drawings with dimensions or notations is a must, and we don't always have the time or budget to get an architect involved!
Using live files to guide discussions: Not all clients are "visual" people, so opening their model and orbiting around their space in real time has been extremely helpful. Clients and trades enjoy the perspective views so much that we often include them in the full-sized drawing sets to give a good "overall" view of the project intent. For complex or tight spaces, sometimes un-rendered plans and elevations just aren't enough!
We typically wait a few years in between renewing, as even older versions are powerful tools for modeling, and we make sure the amount of feature changes are worth the re-investment.
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.
It is very user friendly and easy to learn. It's simplicity allows for a low learning curve so more people can learn it faster. The downside is that most schools are no longer teaching it, so many younger professionals come out of school not knowing it and knowing more complex software and they have a hard time "dumbing down" their skillsets
Sketchup is so intuitive; I can't recall ever looking for official support. However, there are many user forums online that can answer more questions. The usefulness of the online forums is, however, tempered by the fact that there have been many versions of the software under different ownership and support regimes, and thus finding the right information for the right version of the software can be a challenge.
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.
We have not evaluated any other competing software to this one. I heard about this software from a friend who teaches how to use it. She showed me in just a few minutes and I was HOOKED. I saw immediately the possible help it would be to my business. Thank you.