I have been testing the Breier fins since end 2006 or start 2007.
Still playing with them, had some puck shots on them and nothing major to report.
As I have one of the first ones made, the glue on the sides comes of from time to time, but that's about it for now.
I have the custom made foot pocket with 0% angle. Played lots of uwh and uwr tournaments with them and they don't even have a crack so far.

Meanwhile I have also tested the ones with the Beuchat foot pocket, which also gave a very good result. The blade is caught a bit more integrated and slightly stiffer, without passing to the next level of blade stiffnes. This sort of "intermediate level" works better for me.

For optimal comfort, the custom made foot pocket is the best though.