I have tested this with the Micro Canon 550D and the Canon 600D and several movies already made it.
550D = Sound is great, if you set the mic to -10dB, but at the same time need to reproduce a sound program necessarily, because it always takes a noise with on. And please note:. When filming video = Start recording, micro turn on, wait 5 seconds, then must not be spoken! Otherwise you get the sound file not filtered finely. The only drawback to the micro.
600D = Watch out here come the best settings in this combination: 0dB on the mic and in the camera manual Sound of 8 clicks to the right of the 0 point from (far left of the bar).
Then you have a super ton, with minimal noise, that prop is not heard.
So be careful! Only cameras record, the sound levels may itself, otherwise you have a lot of rework.