My thoughts were that it was relatively tame, there wasn't much in the way of gutter sniping like we saw in the Presidential Primaries. The moderator actually behaved in a professional manner instead of being an Obama cheerleader.
Richard Lugar's body language and shifting back and forth, looked more like he was having issues with leg cramps though.
Richard Murdock seemed relatively calm cool and collected.
I don't remember Lugar taking any shots at his opponent in the debate, Murdock took a few at Lugar. However, all and all their criticisms were largely directed at Obama.
Lugar directed some criticism at Senator Harry Reid as well.
I'll let people look at the link, view the video, and decide for themselves as to who won.