My experience with SCUBAPRO authorized dealer:
Bought seawing nova fins from them in 2009 (lifetime warranty back then), after about 1 year it broke in the hinge. Brought back to the shop, they say must send to scubapro for investigation bla bla bla, waited about 2-3 months and after repeatedly asking them then they give me new seawing nova. Used it for about 6 months, broke at the hinge again, brought to them, waited another 2 months before they gave me new one also after keep asking them.
Though in the end I kept getting a new replacement fins, will appreciate it if I don't have to wait several months in between.
I believe nowadays seawing nova is not lifetime warranty anymore? hahaha