Just took this on ICN->EWR on PE. It reclined as much as other PE products crossing the pacific - somewhat more than domestic first class. I've taken AC, JL, CX across the pacific in PE - not so much difference in hard product.

No fluffy comforter or pillow (prob same as Y), but it was all right.

The big downside was lack of IFE for non-Korean speakers (however movies did have english subtitle).

If you were flying Y, I'd get to the airport at least 4 hours before (for US bound flights which is not eligible for OLCI) given the long line. Even with separate PE check-in area, I made throughs security and immigration with an hour to spare even though I got there 3 hours before departure.