I sat in 23K on a 12 hour flight from Zurich to Singapore. The seat was comfortable thanks it is an emergency exit seat, standard seats are a little bit narrow for your legs.

American Airlines Premium Economy 777-200 SWISS has confirmed that it will still offer a First Class cabin on its Boeing 777-300ERs so the aircraft will fly in a 4-cabin layout from 2021.but that leaves us wondering where the space for the Premium Economy cabin will come from. Let's go through the Cabin of the new Flagship of Swiss Air Lines Boeing 777-300ER (HB-JNA). Featuring Economy, Business and First Class Scenes - ENJOY!

The IFE's were very responsive and I liked the games they provide. Movies and shows selection are not bad.
No power outlets but USB port under the IFE.
The food was very good and tasty.
SWISS provide a blaket, a pillow and some earphones, the blanket was alright but the pillow was way to small for a 12 hour flight. The earphones are like those ones nobody will never use.

Swiss Air Flight Status

I had a really good experience with SWISS and I would recomend them.

Swiss Air 777 Business Class