Meanwhile the first flights with Premium have flown.
There is currently 1 787-10 refurbished and by september 8th or so a second 787-10 should be equipped with the new class.
First flights are mostly to JFK (kl 641) and LAX ( kl 601). soon ORD SFO and several other destinations will feature this new class
The new class is currently only last minute available as upgrade option to avoid dissapointment for customers( flying on a not refurbished ac)
By the end of q1 of 2023 all 787-10 and 9 fleet should have the new class
By the end of 2023/early 2024 all 777 should have new WBC seat and Premium, these aircrafts will get a complete make over/new lay out

Elite+ passengers will get a 1 x special introduction upgrade at 200-250 Euro per flight.Other passengers will have to fork u like 350-400 E
This information according to a crew member involved in the product which happened to be on board my last flight.

Dutch platform www.insideflyer.nl will publish a review soon
Edit on www.aeroroutes.com a detailled overview of planned introduction was published on aug 31 st