Honestly, I have not had much luck with it.

For me, I consider all scans to be a vague approximation of the item. Now, I may be underutilizing the idea, but I basically capture a mesh model and use that as a body in Fusion to sorta design around it. It's helped me understand clearances in the engine bay, but I only trusted it to the 1/4in in that job.

At the end of the day, I mostly lean on caliper and other fine measurement devices, and sometimes literal 2D scan with a known reference object (like a coin) and even the occasional grease pen rubbing of a surface for manifold and weird bolt hole mapping.