About 16 years ago, I was returning from Gothenburg to STN on FR. During the standard briefing, I checked under my seat for the life jacket as I always do. Nothing there.
Call Bell: Advised CC of missing jacket. She said that she would bring a spare. As we departed over water, you can imagine that I was not in the least bit surprised that I never received a spare jacket. This the kind of reason they put them in the O2 cabinet.
I only travelled with them once more when I had no choice as friends needed to use them to keep cost low with a family of four. I know they are a safe carrier.