Iberia in business class is very nice in the MIA-MAD, then from MAD-BCN is a short flight the seat is a normal couch seat but in the front and they will serve you food. all IB flights will arrive to 4 or 4s, is a brand new terminal opened this year and connection is easy to do.

for seats, call AA or IB, they will assign the seats. the IB web doesn't work to assign seats when the reservation has been made outside IB. At least for me.

some people in this forum think FAs in IB are rude, but I always had good experience. food is ok.

G.