I have conducted extensive testing of a variety of video cameras and the EX1 is the only one that rivals dedicated studio hardware recording equipment, both on frequency response and signal-to-noise ratio.
One precaution users of the EX1 must be aware of is that there are non-defeatable limiters which are very crude in their ballistics and have nasty "ducking" effects when triggered in the slightest degree. It is imperative that one uses the attentuators to set the recording level, and NOT the record level dials on the outside of the camera. These should be set at "5", as this is the point where no further increase in recording level can be attained with a maximum level at the input before limiter threshold. Higher settings increase noise floor, lower settings will attain clipping at less than digital FS.
Be familiar with the expected SPLs when you are recording. To avoid limiter artifacts, no peaks should ever exceed the 4th white segment before the red segment on the EX1's on-screen meters. I generally record concerts and pyrotechnic events and set attenuators so that average level is about mid-scale on the meters--that way the peaks are well under the limiter's trigger point. This results in transparent audio that sounds as if it were recorded by a dedicated audio workstation.