First time on the A220 J Class from YYZ - PTY in early February. Row 2.
I was looking forward to it. Plane is new and quiet. Feels exactly like sitting in Premium Economy on the bigger birds except less room!
This route was definitely the max in length and probably a little too long for the space. We both started to get uncomfortable - not much room to place your drink or anything unless you have your table tray down. When the meal comes along with anything else you feel like you are eating and drinking in a shoe box with your elbows stuck to your sides. That is how I felt anyway.
Definitely would make sense on shorter routes but 5.5 hours was pushing it, albeit better here than economy.