Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Easy to conceal, and good audio quality

So I purchased this device to conceal it and record things. No further explanation needed I hope :P. So I must say, I got great audio quality, even when hidden somewhere in a room without good audio quality that was about 15 meters away from the audio source. The only problem I had it is the design of the battery casing, but that is not relevant