The cushion is very comfortable for daily work and it provides perfectly supports my back! 
Its a huge help for someone who have to spend up to 6-8 hours in front of computer/sitting everyday. What surprises me is the full set of tools inside the package and its very easy assembly. I must say its s a good value desk chair for a fair price. There certainly are more expensive choices, but this one fills all the essential requirements. I would buy this chair again for a home office. Overall, I'm happy with this purchase :)