Had a biz trip in C class from HKG to EWR on the new A359, here's the review.

1) Seat - very comfortable and the addition of the pop-up extra space on the side, seems small, but makes a huge difference when you're laying-flat trying to sleep. The new pillow is much more comfortable and the blanket as well. Overall, I think the biggest plus in the upgraded C class.

2) Storage space - a regress in my opinion. You lose the shoe-box so you have to put your shoes in the storage cabin to the side (I didn't put it up because I don't want to dirty my briefcase and other things). The storage cabin seems bigger than the old C seat and the cover helps, but when you put shoes in there... The small cabin for headphone is much smaller, and the plugs are now inside that small cabin, making it useless if you want another cabin to hold things. If you travel light, then it's not a problem, but if you have some lose items you want to store, and you take off your shoes, it could be an issue.

3) IEF - a major major upgrade. So nice and easy to use all around. Best upgrade by Cathay in the IEF by far.

4) WIFI - horrible, just horrible. Did they throttle down the speed when they sense it's audio/video? I know they want to prevent people watch loudly but come on, at the price I paid I want to watch something over internet, and I have bluetooth Bose headphone. Speed is inconsistent even just browsing websites. They need to do something with this or else it's just not worth it.

5) Food - same crap. Seriously, I had food on domestic Chinese airlines that tastes better than Cathay long-haul C class food, how is that possible?

6) Bathroom - a little more spacious and window in the bathroom "brightens up" the experience, good touch.

Overall, a great upgrade.