I use it for about 6 months for repeat and concerts ranging from pop to metal. High quality mode using the quad on two tracks, much better than my old MD and microphone sound, easier to implement and more reliable (no vibration bp).
I use the mp3 mode and the input line to transfer my collection of old K7, with the onset of self recording is very convenient.

The pros:
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Can be fixed on a tripod, which can be installed anywhere without problem. Adapters practices microphones (Model Screw optional)

With 2600 mAh batteries, autonomy is largely over 3 hours continuous recording Quad, which is sufficient.

Settings / easy installation

The LED blinks when microphone that it saturates. Practice to show the pb when one is not nearby.

lots of modes / frequencies / Dynamic registration

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The -:
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The transfer from the SD card is a bit slow.

Poor quality housing. The SD card door broke after 3 manipulations. Since then I have stuck and I do not touch more. Do not hesitate to take the rubber protection option if you count the lug often.

Battery indicator is not reliable (close to 0 to pass early and stayed there for hours ....)

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The value taken is very good overall, it's a good buy.