no idea about columbia. as for miami, i have heard mostly negative things but it is all second hand gossip so take it for what it is worth -- maybe someone can offer direct knowledge (i can fill you in first hand after 12/7 but i bet that is too late for you). I heard it is a pretty hard working program with support staff varying from incompetent to disrespectful. that said, i want to decide about places for myself. what one person is looking for, others are trying to avoid. whether you will like miami or not depends on what you are looking for: big city, great but hot weather, plenty of shopping, restaurants, nightclubs/bars, traffic, etc. it is an exciting place to be if that is what you are looking for.