My toe strap broke on my nx2-se's in 2 days on the mountain, send flow an email 4 days ago, still no response... really hoping they send me out a replacement strap because i love these bindings, they feel so solid when you're locked in. It's a little hard to get your foot in and out of the binding because the hiback catches your heel when you try to lower it down or pull it up. but other than that the bindings feel solid. 2 days is rediculous however and i really hope flow realizes this for such an expensive binding.
Based on numerous reviews I've read, Flow has a tendency to NEVER respond to their customers emails.
I was going to buy a pair but this (along with other reasons) is what ultimately stopped me.
Good luck, I hope they actually respond to you. Try calling them by phone if they don't, or return them to wherever you bought them from if you still can.