I visited the Nazca lines in April 2012 and had an almost great experience! I get motion sick very easily so the inevitable happened while up in a tiny airplane circling the lines. Everyone else in my group had a fantastic time and throughly enjoyed themselves. The mystery around the lines is fascinating and I highly suggest a trip to the nearby museum housed in the old house of the women who first studied them. Enjoy your tip!
For more info about my trip to the Nazca lines, and Peru, check out: http://travelingponytail.blogspot.com/2013/01/peru-part-1.html