Look closely. First of all there’s a rigid barrier between the lower and upper seat. That means that fart gasses won’t get through, unlike current seats where farts just spread everywhere around a person, so only the upper seats will be affected.
Second, the lady has her feet up, meaning she has enough leg room to do so. This is a big advantage because you can kick your feet up on your underseat baggage while you sleep or stretch your legs. It’s much better than the current layout where you can barely move at all.
No offense, but I think anyone with a negative opinion of this layout is wrong.