I've been working a lot with FreeCAD since I got my 3D printer. It's been a mostly excellent experience, but I've run a couple issues. Between the MacOS and Linux version of FreeCAD (both 0.19, maybe different builds?), and transferring files between machines using Nextcloud, a project that I'd been working on for a couple days became broken to the point where I could no longer modify the sketches, rendering it useless.