Rated 1 out of 5 stars
This addon keeps on running, even after you've processed your inbox, and uses as many cpu cycles as are available. I had to kill off the process so that I could do work on my computer. (My job is something other than processing spam.)
The other problem is that it goes through ALL your email in all your folders. I spent a lot of effort to categorize my email by putting messages in specific folders. Spamato undid that, moving most of my old email into the Junk folder (false negatives, if you count spam as a negative). I then had to go through all my moved email and recategorize manually.