Never book with Iberia. Me and my wife we had a trip planned to Sao Paulo from Rome return. I booked for us a fully flexible premium economy fare. But our plans changed and I called Iberia customer service for our trip to be canceled, because you can not do it yourself on manage my booking option. Agent confirmed to me that I will get my full refund (3000 Euros). I've got told that refund will take 7-14 working days, which was fine. After almost a month of waiting no refund. So I called them again, agent was very apologetic and he told me that we should've received a refund by now, and he sad he is going to raise the issue and make it as a priority case. So after a few more waiting days Iberia gave me back my refund, but it not even half. After another call from me to Iberia, I've got told by them that is only one leg of the trip is fully refundable and the other is not. I could not believe it, I told them that I have a e-tickets issued by Iberia showing that is a fully flexible ticket, but they keep telling me that this is not. I keep fighting and trying to get my money back, but I am loosing my hope. Made many calls seens than, but all i get is a promises from the agents, but it's not them who make decision. It's been almost two months. So people please avoid Iberia they will scam you.

My wife and I flew Iberia for the first and last time.

I will start with this, the staff on both of our flights (Barcelona to Madrid, Madrid to Rome) were kind and helpful. But there were massive issues with the airline on both flights.

First is that both flights were very late, the first leg of our trip was about an hour late. Making it so we had to sprint from the first gate to the next to get to our layover flight. But that stuff happens from time to time. Not a huge deal, but people on the line for the second plane sat this happens quite often with them. So maybe it is a huge deal.

The main issue is that they lost all of our luggage. I am not sure yet where it went but it’s most certainly not with us and according to the service desk at Rome airport might not be for days.

Terrible, honestly we chose Iberia before because it was one of the best companies recognized worldwide. I must say that the level has dropped brutally, being a Rynair and Vueling level company, I would say even worse. They cancel flights at the last minute, they offer you flight alternatives for at least 3 days later, they give you the minimum instructions and they are rats, they don't have the money to pay for anything, disaster!!! Disaster of service and attention. I hope they close this company because it's going from bad to worse and it doesn't look like it's going to get better.

Horrible low-cost airline, which in the end is not so low-cost since they charge 45€ for 3 extra kg of baggage :)
“Available” desks for check in: 9. Actual available desks for check in: 3. On a high season when the airport is even fuller with people. Moreover, there were two separate lines. One for just dropping off your suitcase in case it was not overweight and another line in case your suitcase was overweight or was not included in your ticket and you had to pay extra. NO ONE told you that and there were no signs. I waited for 40 minutes to drop my suitcase and when they saw it was 3 kg more they told me I had to WAIT again but on a different line. Zero organization. Moreover, the plane was not so clean, seats and space in general not so comfortable.

The airline through the webpage promotes or suggests paying for a seat. I paid more than 100 dollars to save a special seat. On 2 of my 4 flights, I lost my money they did not respect the payment. The worst part is that they don't care. It is not important for them.
I would recommend using air France rather than Iberia.