I use a Delta X5 contractor's Saw as my primary table saw.  I do just enough dado and tenon work that it spends most of its time without the blade guard or splitter in place.  As the Delta is set up, removing and re-installing these is just bothersome enough to appeal to my lazy side.  I finally put in a Merlin splitter a while back, which gave me some margin of safety, but the simple truth is that I needed a blade guard that floated over the blade.  After some price and feature comparisons I decided to use the Uniguard.