I am.
This product uses patented technology (actually, particular mineral), patented by russians. Ukrainian company uses that technology, but there are some issues. Russians claim that they stopped supplying components to Ukrainians so they do something on their own, and results are unpredictable. XADO says nothing bout it.
Being fluent in russian, read ALOT of info about XADO, just spend few hours couple of weeks ago researching XADO. My ex brother in law was researching that stuff some time (4-5 years) ago, got in contact with people from XADO, they were very optimistic. I got XADO about 4 years ago, treated my camry sv21 and my stagea - engine, gearbox, power steering system. SV21 done about 400k , goes OK, original engine. Still got XADO tubes at home.
Well, there are DIFFERENT opinions about XADO on the forums. Some of them are VERY interesting, that stuff seems to be working (if you get real product), at least for engines. I can dig out some photos and publish them here if people want
Oh, and by the way - they charge arm and a leg here in AU, XADO is CHEAP in Ukraine. I mean - cheap, few bucks per tube or so (can find exact prices). If people want to go down that path, I can probably get in touch with some people from there and organize a group buy.
PS can provide more info, but tired of typing Welcome to PM me with ur number if interested.