This tool enables you to, selectively or in bulk, extract data stored within the Mindbody service via their API.
There are a few reasons why you may want to do this. First and foremost, one may decide to do this because they don't want their data potentially being "stuck" in the Mindbody system, if their state of their contract with Mindbody goes awry. Other reasons would include wanting to test in-house code on a set of real data without having to clobber the API, or risk having bad code break your data, or even just being able to convert the data to a format which you can more easily work with in your application.
Obviously I don't want to step on any toes, so if you're a representative of Mindbody, and wish to speak with me, feel free to drop me a line. I'm a "Champion" on the GetSatisfaction forum for Mindbody (currently the only one?), so you can be sure I'm not providing this tool maliciously.
However, that being said, "data freedom" tools are quite commonplace for online services which house a lot of data. It is the client's data, being accessed via an openly-accessible API, and by default this tool will run with "no clobber" settings in order to not expose the service to abnormal levels of load.