[eschwartz]

Using the Editor and metadata handling is fine.

There is no good reason to specifically use calibre's ebook conversion engine when Amazon's kindlegen works as well.

Also, kindlegen creates dual MOBIs which Amazon's servers will split into MOBI for older Kindles, while ebook buyers who have newer devices will automatically get the KF8 copy of the book. You can upload MOBI to Amazon, but they will reject dual MOBI and KF8 files that weren't converted by kindlegen.