Due to an equipment change from an A320 to an A321, I switched us from 11C -D to 13 E-F to try them out. These'll be our go to booking seats on the 321 from now on. Great leg room and under seat storage (no power or AV box under Row 12). Another benefit is that there's what I'd describe as POS protection with the hard sided seats. No way they infringe into your space in the seat area and there's plenty of "lean room" to the side for your upper body if needed.

I was in 13E and had a nice conversation with the FA.