As a professional guitar builder, I am always on the lookout for high quality tools at a great price! The Hosco fret file hits that mark!
Pros: high quality super fine teeth. Perfect radius inside in the middle with the same fine teeth on two sides and a smooth side on the bottom to protect your fretboard.
Con: It would be nice to have a slightly thicker handle, but it isn't necessary. What is there is very workable.
There are many other "cheap" files available, but the quality simply isn't there.
You can pay more for a fret file, but why should you? The Hosco file is a professional grade tool at a consumer grade price.