Having recently had an incident with my tabl saw, in which I lost at the cost of the end of my left index finger, I have a distinct perspective.
The accident was my fault. It was a cut I had done a millilion times. It happened because I was splitting a to short piece (9"), without an overhead gaurd and splitter. I did have my fence installed, and I was using a push stick to push and my hand to hold it against the fence.. Essentially the cut was finished before the piece was through the blade. The offcut piece was caught by the blade and thrown clear, and my finger slid in, taking it's place.
Could a saw stop have saved my finger, yes. But so too could the blade guard and splitter if I hadn't removed it.
Could I have still lost my finger with the Saw Stop, yes, If as mentioned above, I locked out the brake system.
My problem with Saw Stop is not the technologie, but the methods used to force the product into the market. The infamous lawsuit against Bosch involved the individual removing all the safety gaurds including the fence. If the indiviual involved (or myself) had had a Saw Stop, the accident still would have happened, if the system was locked out.
With this case as prescident, if the company mentioned above that runs their saw locked out, should have an accident. The owner of Saw Stop would be held liable, because he allowed the safety to be blocked.
Even after my accident, I am a firm believer that I am my best safety feature. My guard before, was removed because I was to lazy to put it on and off all the time. Its easier to just leave the guard off. I am back using the saw again, (it took a couple of months), but now the guard is on unless it has to be removed for the type of cut. And thos, I'm still a little leary about doing.
Just my little vent.
Play safe everyone.