A newcomer
Why are there no reports on this site from people who have used your products successfully????
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This protocol is new. We have had success with previous versions. But we changed the protocol because this one is better, will work faster and produce more improvement, and is easier to use. One reason our recommended supplier gives an extended guarantee is so that you can know they are confident this protocol will work. Another reason is that it will work as the not so good protocols were working, so why not offer the guarantee.
Hope this answers your question adequately.