It seems AIVS collects the vote of many who tried it.
Well, it is like reading a review. All is great, all is fine but:
AIVS is a multistep cleaning solution, that means, any owner who spends 30 minutes per record expect to hear terrific improvements. And the more fluids he can use, the better.
I am sure, when any of the other users clean their record 3x with LADS or whatever, they will get the same result. I used AIVS, too and it didn't bite the bullet for me. Probably I have a superior cleaning machine, who knows...and not one record I cleaned with the Enzyme fluid gave me an improvement to the fluid I used before with it.