How to 3D print from FreeCAD

Hi there. I’m learning FreeCAD, and so I have constructed some example bodies. How do I print them with SM 2.0? I guess the easiest would be to export them from FreeCAD and bring them into Luban. But what format should I use—FreeCAD has around forty export formats. Should I use STL or is there a better format?

Edit: I’m printing now with the exported STL, seems fine. Still wondering if this is the “best” format among the options.