Saw Stop saws do work, but when they trip you have to replace the entire brake assembly and get the blade re-sharpened. The brakes are expensive (about $80 for the saw I used) and it wont work without one. So unless you keep an inventory on hand your project is delayed. Or you do something foolish to complete it. They are great for a shop with employees, but for a personal shop I will keep my uni-saw. Nothing will replace common sense!!!
I have scars on both thumbs because accidents happen, but still have all 10 digits. Keep your blade a 1/4" higher than the work, always push your work through, and if someone comes up to talk to you shut the damned thing off. That is how both of mine happened, distractions...
Anyone that doesn't use a push stick of some kind is foolish or likes pain