Flying Aeromexico

We haven't flown AeroMexico for a number of years. When Mexicana went under we lost our tickets(2 sets of r/t for 2) on our first replacement flew the Red Eye out of O'Hare with AeroMexico. Everyone started lining up to board before the announcement for boarding- what a mess. They had just started the procedure of immigrations and customs when you got off the plane in MC. We were given no instruction. After going through immigrations and going into the next room we saw our luggage. We got our luggage and now what do we do with the suitcases after going through Customs. Someone told us to go right out the doors and take the elevator up and wasn't sure which room to drop them off at for the connecting flight. Well we got in 2 different lines in 2 different rooms before someone helped us to the correct room and drop off. As usual the flight to "Z" was not on the board till 10 minutes before boarding. We board and sit there- finally someone says we have to get off because of a mechanical problem. It was follow the leader to another gate. There was no announcement but saw passengers from the plane going behind the counter and down a walkway- of course everyone follows. We get to the bottom of the walkway and we catch a passenger mover to take us across the airplane parking area to let us board another plane- I think we were about 2 1/2 hrs late arriving at "Z". Our next flight in February (our 2nd r/t we had to replace)we were able to fly Continental out of Lexington for the same price out of Chicago- we have flying Continental/United ever since.