Cryogenic treatment; who’s used it, or share some hearsay

While reading through the mod man intake thread earlier this week I read a linked article referencing a 360 magnum block build:
Valley Performance and Machine Service’s 376 cid Mopar Engine

Personally, this was the first time I’d heard of an engine block(amongst other parts) being cryogenically treated. It was my previous understanding that this type of treatment left metals harder, but also more brittle. However, I kept digging and found that the process has changed over the years and that this is no longer the case(article linked below). I am considering having my own block treated as well as some 727 components. Has anybody here had a block or other parts treated? Any input, links, articles, or experience would be greatly appreciated. The treatment itself is fairly inexpensive especially considering the potential strength gains.
https://nasaspeed.news/tech/drivetrain/the-advantages-of-cryogenic-processing/?amp
The Advantages of Cryogenic Processing - NASA Speed News Magazine