This is a good audio recorder that I use extensively in VOX (voice activated) mode. The audio quality is superb and is very sensitive. However, the high sensitivity also means that you'll have (many) extra recordings each time a lawnmower, siren, or jet is heard. That's not really a problem with 8GB of storage though. The problem I've found is with the battery life being much shorter than advertised. My typical VOX run-time has been 7 days; not the 24 days as seen in the literature. Pro Tip: Pair with a USB battery charger to extend mission life, and buy more than one recorder/battery pair to swap as needed.