I prefer the new J to old J. Everyone's criteria differs, but privacy and fully flat were my top two issues, and were the main reasons that I almost always bought J and used miles to F (or just bought AONEX) when flying HKG to NYC. But given the improved J (for my needs) and the decreased F offering (for the soft product.. the seat / IFE is awesome) I see myself being content in J, so will by Y and upgrade to J. Does my wallet good...