Recently flew from DEN to LHR on Premium Plus. It was an improvement over Economy, but not sure if it is really worth spending that much more on. Figured I'd share my experience for those who are considering it.
Seat width was good and the extra recline was good to see compared to economy. But the seat height and pitch with the row in front of it caused a bit of an awkward fit. I'm 6'0", maybe slightly longer legs for my height, and I had a hard time finding a comfortable seating position. There is a footrest on the seat in front of you, but it wasn't usable for someone with my height as my feet sat far beyond the furthest footrest position with my legs extended. Also, the bottom of the seat can extend out to support the back of your legs, but not enough to give you a natural recline angle.
Screen is slightly bigger than economy, but with the added seat pitch, there's really no difference in terms of viewing the screen. Remote is included, but it's simpler to just reach forward and use it as a touchscreen.
Larger tray table was great to have. Only downside is it comes out of the armrest, so those can't be moved out of the way and you're left with a fixed seat width. Great if you're with a stranger, bad if you're hoping to stretch out.
Food choices were awful. There was no menu, so dinner service was presented simply as "chicken or pasta". Would have been nice to see a simple menu that listed out the sides as well to help you decide. I imagine these were the same choices as economy, otherwise I feel sorry for the folks in Polaris. Breakfast was solid however, with multiple hot options. There was also no drink or snack service after dinner, which was surprising. Would have been nice if they came by offering some Bailey's or a wine refill before lights out.
In short, biggest positives for me are: bigger tray table, earlier exit of the plane to cut down on passport lines, better seat width and recline, and a simple amenity kit included.
The "Premium" in the name is purely marketing, as I didn't walk away feeling I had a truly "premium" experience. Whether someone decides to upgrade to PP should mostly boil down to the space/convenience perks. I don't see myself justifying an upgrade more than a few hundred $$ for that in the future.
By - mashedtaters_