How safe is microwave cooking?

In the inception stages, microwave cooking was not accepted, as is the case with any new invention.

Subsequent changes in designs have perfected this gadget, and it very useful in the current times. It cooks at faster speeds, the food does not lose any vitamin and nutrients, and a variety of options are available, like spin cook, grill, and various time settings.Non veg food that normally takes hours, is cooked gently,thoroughly & fast.

(From Yahoo Answers)