Pretty pricey...are they worth it? Thanks.
Depends on how you define worth.
The cryogenic method gives proven repeatable results on numerous properties of materials (I spec it out frequently on gears, knives, shafts, various impact and conveyor parts and gun barrels and on some conveyor brake rotors)
It greatly enhances things like service life, wear reduction and stress reactivity. It doesn't "add" anything to the material not already present or makes it "stronger", "better" etc. as many ads misleadingly claim.
It also does NOT
hide or correct any other design or manufacturing defect. ( it can actually make it worse)
All Cryogenic Treatment does is normalize and make stress/grain etc. more uniform which reduces pockets of stress and equalizes force over the mass more evenly. That adjustment going from say 93% stress relief to 97% will give a significant difference though.
Its definitely a legitimate technology with proven results ( but often distorted by misleading advertisement claims or by people who have no understanding of the technology)
These people must be proud of their stuff though because their prices are a bit high. I would recommend going to a company who does one offs like gun barrels and let them throw it into the next scheduled batch because most vendors charge by the pound. ( much cheaper)