Good Thing

Good Thing n.,adj.  Often capitalized; always pronounced as
   if capitalized.  1. Self-evidently wonderful to anyone in a
   position to notice: "The Trailblazer's 19.2Kbaud PEP mode with
   on-the-fly Lempel-Ziv compression is a Good Thing for sites
   relaying netnews."  2. Something that can't possibly have any ill
   side-effects and may save considerable grief later: "Removing the
   self-modifying code from that shared library would be a Good
   Thing."  3. When said of software tools or libraries, as in "YACC
   is a Good Thing", specifically connotes that the thing has
   drastically reduced a programmer's work load.  Oppose {Bad
   Thing}.