Actually we had 4 flights on Iberia in three weeks. Mexico City to Madrid, Madrid to Brussels, Amsterdam to Madrid, Madrid to Mexico City.
Read many reviews before our first flight and I was thinking O.M.G. what did we get into. It turned out to be one of the best flights I had ever taken. The service was excellent and the food was above average. Our domestic flights were average as a domestic flight goes. The international legs were above average. Yes, we would fly Iberia again.

One of the worst inboard services experienced in 20 years
Seat excellent due to tier status
IFE very good
However crew extremely arrogant and demotivated. Only one drink service for dinner then crew disappeared for break. Nobody appeared until 1h30 after pressing service button. Worst European airline experienced so far on long distance. Very sad because their short haul subsidiary Iberia Express is excellent. However long distance does not seem to be their core competence. Never again

If you want to be confined for 8 hours in a space design for a three year old child, fly Iberia...if you want to have food donated by The pakistan army, fly Iberia and if you want to be treated as a serial killer, fly Iberia..and remember that you will have to pay for this!

People are very quick to complain about airlines. But my experience with Iberia yesterday was outstanding. Due to weather, my plane arrived in late at Casablanca to go to Madrid, which meant I missed my connection to London. When I arrived at London my new flight was closing so Iberia bussed me to the plane. I was convinced my luggage had no chance of making it. Low and behold when I arrived at Heathrow, there were my bags, first off the belt. Well done Iberia. Great service all round and you turned a problem into a service delight!

When I was booking a flight from Porto to Barcelona, I weighed the possibility of flying nonstop on Vueling at half the cost of the IB flight connecting in Madrid. The scathing reviews on Vueling told of many horrors with abrupt cancellations and numerous accounts of lost baggage.
I choose IB and guess what...I had to wait 3 hours for one of my 2 checked bags to arrive. It caused me to have to pay a €25 late check in fee at my AirBnB.
There was no kiosk checkin at OPO, even though several other airlines allowed it (including Vueling). Instead there was a long line waiting to checkin at the IB ticket counter. We waited, while watching the 2-4 IB agents sitting at there stations, laughing and visiting with each other. They totally ignored their waiting passengers.
Both of our flights were rather short but the only way to get a soda, coffee or even a cup of water was to pay.
I guess I am just spoiled by American Airlines excellent customer service. Even on most short hops they at least serve complimentary beverages and a bag of pretzels or nuts or a Biscoff cookie.