Seats
The Puma seats were okay as long as they were adjustable in all their modes.
If the lumbar support failed, which lets face it us old farts need, then the engineers would lock it in one position and you would come out with back ache.
The company I worked for paid for personal lumbar supports for their pilots. Worked a treat. Cheap as well.
The other problem was the arm rests getting broken by pilots standing on them to look into intakes to check run down times. The arm rests made it just about comfy.