Personally I prefer the weatherzone radar as it shows Lightning as a default when looking at Aus Wide or the State Views, often times there are areas that aren't necessarily covered by a Weather Radar but due to the nature of Lightning it can be picked up at incredible distances. Having a look right now I can see a few areas of Lightning Activity that with the feature turned off and just looking at the Precipitation wouldn't be immediately obvious as being thunderstorm activity.
Also, when I first saw this, I thought you were referring to the ADF, the poor mans lightning detector! Can also be useful, only good reason to have one these days I think, other than for getting the cricket scores
