I'm assuming you want it to reduce/eliminate water hammer? this is a soft start only and not a soft stop, looks like it also requires a heat sink. A soft starter is not designed to use less power to ...

I have a Ryobi table saw. As far as Ryobi goes, it's one of the better ones, but in the world of table saws still a piece of junk. For my occasional use though, I couldn't justify a more expensive one ...