I'm using and selling Vist bindings since 3 years, my lasts are V614 Harlekin on 07 Gotamas in 197 used in full conditions, no problem they work great with their big Teflon plate. Some people had problems with smallest models (V311, V412) that were releasing a bit too easily apparently, a bit like Spherics. V816 have a backward release lock that is great for FS and FSBC, i really think Vist makes great bindings for freeskiing.
It's years Vist is making these and selling bindings for other manufacturers, it's easy as you can easily change the shells yourself and they just have to make new shells with manufacturers' names on it : Amplid, Stockli, Movement, Lacroix, Nava, etc... Check their website (
http://www.vist.it/html/en/partners_bindings.php?p=19)and see the number of "partners". Recently there was Nordica in this part so maybe Nordica was provided by Vist and not the contrary... It's what i think !
FKS are not using the same frame that Axial bindings... The proof is... FKS Are perfect and and Axials are just useless fake plastic things.