I'm interested in purchasing some noise reduction software and I'm kind of torn between Noise Ninja and Neat Image. I've tried the demos of both. I like the results from Neat Image slightly more, but I've been informed by someone that a friend of hers had his Mac trashed when he installed Neat Image. I've also been told by someone that Noise Ninja can get some excellent results but I would have to play with the settings and the manual is rather vague about what the settings control. Anyone have any recommendations? Personal experience? Samples?