a year ago
You can't go wrong if you are targeting school that is ranked in the 1%. Other factors include, focus of the program, convenience (or min inconvenience), cost, culture, alumni network, etc.
Time, remember to invest time and don't just go with the first choice that comes up in Google, identify schools or programmes that interest you and then look and see if their programmes fit with your life and what you want to get out of them. Invest some time into researching and be organized about it. Honestly, if you can't perform this step you may not be a great candidate for a top level MBA.