Had the pleasure of experiencing the new 10 abreast last week. The seat was very comfortable with excellent cushioning. Not sure this is due to the fact that's it's only a couple of weeks old, but at least there were no issues like the completely unprotected lower back like on the 350 Y seats. The IFE is fantastic - and you can skip ahead through the commercials using the FF button method .

However, and not surprisingly, you can def feel the missing 1.5 inches on the sides. Played around a bit, and it would be near impossible for me not to protrude into the neighbors space. No way to avoid rubbing elbows and arms. And I am certainly not a COS.

Had only read about 10 abreast on other airlines, but will try my hardest to avoid these in the future. If there's no other options like KA on my routes or can't fly PEY, I can honestly say I will look into other carriers.