I currently swim with the first version of the Breiers and Liam is right. They have to be reglued on a regular bases. Especially now the sides have been added.

During the Europeans, some players had a new version of the Breiers, with a closed foot pocket of Beuchat or Immersion. The two main differences I saw, was that the sides were much better fixed and the fins became a bit stiffer. The regular Breiers are a bit too flexible in my opinion.
The pocket with the Immersion also had a velcro on the top to strap the fin better to the foot. Interesting concept if you ask me.

Problem though is the price. They cost around 190 or 200 euros, which puts them in the higher price range of fiber fins.