This is an outstanding and informative review of P E Class, and, apart from Cathay's normal meanness regarding amenities kit, seems pretty good. The old Air Rage Prompter of the guy in front's seat hitting you in the face when he does a high speed recline has been dealt with.
50% more than economy? Yes, especially if you can get the front row.
Credit where it's due but buy your own adaptor if you're a regular. What did I say about meanness? 20 adaptors for an entire aircraft when they need them in EY too AND they don't sell them either.