Yeah I saw that one too but I would highly suggest getting the Muter instead because
1) It is built into a suitcase which is really handy in our hobby (easy to use while monitor is still in cab)
2) There is documentation for the Muter, I have no clue what brand that one is and you really need a manual with these things AND just as important, a list with tubes and what adapter to use
3) there is a (small) Muter userbase here, at least Andreas and I have one and have some experience with it so in doubt we can help out....
The real "grails" of the rejuvenators are the Muter 2005 and Sencore CR7000 since these are microprocessor controlled and do "automatic" rejuvenating. With he older ones you have to keep an eye on three "key" moments where you must stop the rejuvenating process. Those "grails" do that for you and so are a lot easier and safe to use. However both of these still get decent money, several hundred dollars or Euros.