HAF - Home Audio Fidelity (Room Correction / convolution filter creation)

I know about 8-10 testimonials on the French Hifi Forum, where Thierry beta-tested his solution.
I have not seen any negative report. The “worst” I saw is one member found the HAF correction comparable to what he was able to achieve with REW/Rephase. I know his room is acoustically treated and dedicated to hifi.