Although your essays and recommendations will be play a vital role, from what you have written you are a competitive candidate at the schools you have listed.
Business schools are very accommodating of applicants who are considering changing careers, so you should not be concerned about that in your application.
We have a list of case studies here, which should provide some insight into the application process: http://www.stacyblackman.com/case-studies/
Hope this was of help.
Conrad and the Stacy Blackman
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MBA blogger, US News and Author, The MBA Application Roadmap