While some might think the vest is a perfect idea - it seems kinda pointless to me, since the NWA FAs are required by the FAA to prohibit its use during taxi, takeoff, landing, and other times when the seat belt sign is on. During all those times, you will have to discontinue its use and hold your one year old on your lap with only your weak arms.
couldn't agree more, except you can use a sling and not just your arms. i just used my baby sling that the baby was already used to. i wouldn't want bulkhead because we like to have our stuff under the seat close by. and i also never got the extra seat for several reasons: the sling was safe, baby was secured to me; he was used to napping in it all the time anyway, and when he was older we always lucked out with an empty seat in our row (prob. not too likely on an international flight, but you never know) he would stretch out between us