You can't compare animating a model in MED and animating a model with Blender for example : it's day and night
In Blender you have options to visualise bones, you can paint weight, it auto calculate frames between IK keys etc ... etc ...
And Blender is free, with a new more friendly version incoming.


I really don't see the use of MED, it can be good for beginners in game making , or little tasks, but when modeling , animating serioulsy it's a pain ot use and can't compare with specialised tools.