having travelled in both cabins, I have yet to feel jet-lagged when I get off the aircraft from a Club seat!
I absolutely agree!
Just to stretch out and not have your knees and elbows knocking against someone elses during sleeping/ eating. etc is a godsend.
You could lift you legs into the air if you wish (I'm not called sixmilehighclub for nothing you know!) and theres no person in front of you to recline into your chicken casserole. The food is better and theres a wider range of higher quality drinks.
If you're clostrophobic, its far better too as you do feel theres much more space.