File this under great!
All the positive reviews for this nail file convinced me to get one for myself.  It really is a neat file, designed with three differently-configured surfaces (flat and curved)  to address particular filing issues.  The size is perfect and the case is very cleverly-designed.  I've tried practically every nail file surface out there, and ceramic wins hands down. This one gets five stars for being as close to perfect as a nail file can be.
Rating: 5 stars