Just completed two flights in 53K (LHR-LAX and SFO-LHR). Both experiences were the worst I’ve had in CW, largely due to significantly higher environment temperature relative to the rest of the front UD cabin and insane galley noise (not service related - just crew chatting and laughing). LHR-LAX was exacerbated by the fact that the crew didn’t shut the curtain. Up until this experience, I considered galley noise warnings on seat maps somewhat petty, as I had never had any issues myself given that I use noise cancelling headphones. Partner in 53J complained about passengers grabbing onto the seat on their way to the galley.

59K on two sectors prior to that (LHR-HKG-LHR) however was excellent, though not as good as most seats on 747 UD.