I have had Ezzy sails of various year models up to 2015. More recent year models are lighter and may not be as tough up top, but still would consider the quality to be very very good.
Mostly Panthers and Cheetahs.
Having used most brands, Ezzy's seem to have the lowest down haul tension.
I'm no engineer, but to me a sail designed to perform with less downhaul tension has to last longer and have less stretch over time. Not to mention the mast will be thanking you as well.
All my ezzy's can be downhauled easily with bare hands.
My NCX in comparison takes a leg press with the rope attached to the harness.