I got Green Icon from NLD at the same time Zoia did. It bloomed the first spring, but not in abundance. It's stronger this year. It has a lot going for it:
OMG- it's REALLY green!
It has ridiculous substance. Plastic!
It has a long opening period- almost nocturnal. Don't deadhead until you're sure they are spent, or you may miss some gorgeous waxen blooms in the evening.
It's blooms are massive!
All in all, a unique and arresting cultivar.
This picture was taken at nearly 9 pm and the petals were still rock-solid substantial: