We have had connecting flights many times in the past and several under an hour layover. They were either in Memphis or Charlotte not in Miami. To our amazement our luggage always made it and a few times we watched it being loaded as we sat in our seats (whew!). A few years ago we had a direct flight and 3 of our 4 bags were lost. It was a nightmare since the bag that made it only had beach towels, snacks, inflatables, etc. Since I always bring a ridiculous amount of clothes and shoes I was miserable to say the least (well the trouper that I am I did manage to have a little bit of fun). I started worrying that the airline wouldn't find us since we stay in the small hotel behind the Shamrock but at 10:00 pm the next night (Christmas Eve) our bags were delivered. What a great Christmas present.