Just bought the Dlink S150 and was very surprised there aren't more plug-in motion sensors.
I was happy to see it support ifttt but found it completely useless without a "when motion stops" event.
When motion triggers, we can turn lights on..
But when motion stops.. or there is a n seconds delay between motion.. you need to have another event to trigger another command. Without that the ifttt support is all but pointless.