the vantage seats are not the best IMHO. after quite a number of flights on jetblue in the US which uses these as their "Mint" class of seats transcon on an A-321 with doors every other row (where it is just a single seat) -- yes they beat AA and other legacies handily--but overall, the slightly cramped footwell, and lowering of the seat when turned into a bed make it not ideal to me!
but hey, i'll take more storage and more space on BA club any day regardless of final seat!