One of the fastest guys I know rides them and they feel like they do what they say they do. I believe they have been making dirtbike bars for years so it makes sense to transfer over to bikes.
I think the issue for many people is with 35mm you either need a carbon bar or a high quality alu bar. The larger diameter can transfer more vibration that can cause issues. Prime example is the flat Race Face alu bar that comes on a ton of bikes these days, it was killing my hands. Replaced with a Renthal and instantly felt better.