Ms 'Loo and I seem to be prone to some hex or other with NCW seats - either one or both of us always has something wrong with the seat - inop video, some recline/lumbar control that's funky or dead... but the most common (and not a deal killer - none of this is compared to WT+/-) are tables and shelves that have lost their self-control. The little drink traylet is typically limp so that when a fully laden double Margarita (oh wait) is placed on it you have a sudden trouser fiesta.
Plus if you choose a window seat (wonderful upstairs on 744s) on a sleeping flight, and the aisle person stretches out, you'd better have the bladder control of a camel, or else negotiate a loo schedule in advance of lights-out, 'cause otherwise you're well and truly trapped.
Note your own noise-canceling 'phones may need an adaptor.