The Silveredge lists none of the features of the auto shut-off current controlled Silver puppy or Silvergen. The fact that it comes with a timer makes my BS meter go off. If you have a auto current control you don't need a timer as the CS gen turns off at a set ppm/conductance level. Way too much money for something that looks pretty low tech. If he is high tech then he should explain what makes his unit better than the others like Silvergen of Silverpuppy do. I would avoid the Silveredge, great sales pitch though. I get his flyer every few months and it does have some good info on the many uses of CS.