Where  – there are quite a few criteria  which sprout up when you consider these choices. There are established educational  Institutes providing High Quality MBA’s and  there are  a few colleges which would not necessarily come  into your mind unless  you have done thorough research but which match if not exceed the Quality of these established players.
When making  a  choice of an MBA its its very important to look within and try to find out the reasons for doing an MBA and  then letting this reason be the  guiding factor for you.  Here are some o the reasons that I have come across

1) For better  job prospects : this  is a questionable driving force for joining an MBA  , its always better  to have a  more  well thought approach to an MBA  . An MBA is an investment in yourself and if chosen well any MBA would add  this value to you .  But if this is your prime reason for joining an MBA you need to reconsider to make a better choice of school.

2) Have a Business Idea need tools to  make it into a reality  – Well if you are the creative sorts and have business ideas , no matter how far-fetched they seem it would be   a good Idea to join an MBA  programme which has specialization in Entrepreneurship.  There  are many schools who offer this .  Do remember  that sometimes this process can be disillusional and can bring you to  more concrete reality. So an idea might be rejected but from the MBA you would learn to build more  grounded business plans and to be a better critique of the business plan.

3) Haven’t got a clue but am sure an MBA will help  - Its a better idea to choose schools which offer a more holistic  approach to the MBA , an MBA  can be used as a navigational tool , to chart out a career path for yourself as you move ahead in the MBA.  Here its more about a trial an error methods and I would advise aspirants driven  by this motivation to focus on the MBA  experience and make a choice within the programme.

3) Well I think I have tried my hand in strategy and  I want to learn more about it / Want to join a consultancy  - For people who have given deep thought to their past experiences  its a good idea to Join an MBA  which is strong in strategy eg Harvard , Strathclyde etc.  The process of the MBA would equip you with tools to identify the need for , create , implement  and to test out Strategies.

4) I want to specialize   the answer for such people is simple choose a school renowned  for your specialization ad go for it full hearted.

Other  things to consider  -   Duration of course 1  yr – 2 yrs, Return of Income, Class size , ability to network

An MBA  is a learning experience its not so much about the  actual learning its more about how you apply this  in life.Its not an educational course  its a course in changing your life , I would recomment it to all , but its important to know or to identify the takebacks that you need from the  course well in advance.