I had my first experience with these Zodiac J seats yesterday, and found them to be quite narrow with a dearth of storage space.
Positives included that the divider was movable from up to down position, and I failed to notice any movement from the large guy behind me in row 2. (Somewhat humorously, when I mentioned this to my wife, she said she could feel my movement in the seat next to her in middle).
Another positive was that movement from seat to aisle was more easily accomplished from lie-flat/recline position compared to the 772 J seats.