unlike certain other efforts, this is a nice, clean, simple implementation, but it seems likely the author dove in without awareness of ManOpen, which in comparison to ManHandler adds:

• hyperlinks to related man entries
• apropos
• a command-line tool
• proper text styling
• printing that works
• ability to search within a man page
• ability to page with space/shift-space
• lots of control over the overall experience/appearance

in my opinion, without some sort of conceptual breakthrough, ManOpen has this category sewn up