Pros:
- make anything you want out of plastic
- no/ little labor of building
- convenience
- create in bulk
- humanitarian uses
" Doctors will potentially be able to manufacture tailor-made body parts or organs, directly from replica human DNA, which would bypass the problem of donor rejection. - See more at: http://www.labmate-online.com/news/news-and-views/5/breaking_news/the_good_the_bad_the_ugly_of_3d_printing/31720/#sthash.8mi9rguU.dpuf "
Cons:
- only plastic
- unsturdy, only material is plastic
- expensive
- right now very early stage primitive
- violent uses
"Last year, the world's first 3D gun was printed by controversial American group Defense Distributed, who have plans to publish the blueprints online. - See more at: http://www.labmate-online.com/news/news-and-views/5/breaking_news/the_good_the_bad_the_ugly_of_3d_printing/31720/#sthash.8mi9rguU.dpuf"