I installed two of these at the first point of the house that people will pass on the driveway. Unfortunately though, cars pass about 15 feet away and it doesn't really go off. Also, the range in motion of the lamps is a bit limited. The motion sensor range is pretty limited as well if you are trying to concentrate the lights in a particular direction. These would definitely work best for straight ahead motion sensing, which my application is not.
Set up was very simple and straightforward. The timer setting is great. The only problem I ran into while installing was that I mounted them on uneven stone and the plastic mounting bracket sort of bent out of shape when I screwed it in.
So far though, I would say I am more pleased with them than the one that came installed in our house, it's much less sensitive and is more accurate (leaves blowing on the ground will set off the older one).