Better than expected. Arrived in a damaged box, so the gas riser cowl was broken. But used the one off my old chair. 
All in all I’m happy, its a firmer seat than than previous. But after Circa 10hrs of working from home. My legs still feel good and not dead. 
Just need to improve the transit, delivery method. 
Had it not been for my diy skills, it would have gone back.