Marvelous Designer is an outstanding piece of software. I've been using it for a couple of years now. I don't really have anything technical to add to this discussion, but I do have examples of what it can do. I recently completed a personal project called 'The Jenny Wren Project'.

http://cgandme.com/?gallery=the-jenny-wren-project

All the clothing for the project was created in Marvelous Designer and exported to Poser Pro 2012.