If you are trying to sell FIM in your organization it helps to have some good reviews (not that FIM is hard to sell these days!).
This review by InfoWorld is quite favourable.
I’m a big fan of RTFM, and found myself a little confused by some of the MSDN documentation for FIM 2010.
If you encounter this:
This API supports the FIM 2010 infrastructure and is not intended to be used directly from your code.
It means the item isn’t officially supported. You’re free to try it of course, and the item is likely used in the product internally but your mileage may vary.