Got a call from a guy today. Any experience out there?

Seems too easy. They are NWFA members (yea anyone can be one) and are recommended by Sika

https://www.youtube.com/watch?v=4DShlddx3QM

Go to there website. States works well for CC results 3% or less. Wow, that is the requirement to proceed anyway comparable to RH testing of 75% RH. Read carefully as far as I could see they will give you new product if it fails. Wow again, image hospital failure remove all patients etc etc etc you will go broke dealing with that.
Appears to be a silicate type product and every concrete forum I have been on laughs at this type product. Have not seen an endorsement from Sika and that would be strange they have a product called called Sika Primer MB that they profess does the same thing. Any way read the fine print even those that say they will stop Vapor only state that is so IF there is plastic ground cover under the concrete. All concrete in contact with the earth will be subject to moisture vapor the question is how much due to the moisture in the earth. Arizona not much Florida oh yeah.

They seem to be making the rounds on forums of late.

Jim, yes, less 3lbs/24hrs/1000sqft and when it goes up they are out, rather you are out because as we all know any moisture test is a snapshot of the day/s it's performed.

Elmers glue works under 3lbs, big deal.