As inhumane as they were, was any valuable information that sped up medicine collected from Nazi research?
Perhaps experiments deemed too dangerous to be performed on humans, even in the 21st century.
This has been asked quite recently and there are some terrific answers in here. Also, the FAQ will direct you to more information should you desire it.
http://www.reddit.com/r/AskHistorians/comments/1dlaum/as_fucked_up_as_it_was_did_the_nazis_actually/ http://www.reddit.com/r/AskHistorians/comments/1bdv3d/this_is_a_really_messed_up_question_but_here_it/ http://www.reddit.com/r/AskHistorians/wiki/wwii#wiki_human_experimentation_in_ww2