I purchased one last fall, for the very little cost, I am pleased with it. I have a couple of other lightning detection subscriptions to other services, but the Acurite lightning detector by far gives me the "heads-up" locally much faster. I have profiled a couple of parameters I am curious about & posted them here.
http://www.wxforum.net/index.php?topic=30139.msg303836#msg303836
http://www.wxforum.net/index.php?topic=30139.msg303836#msg303836