San Diego Joe wrote:
I have had one for three years now and it is very effective. The only down
side I have seen is that it is hard to tell when the battery is used up. My
first one also had a defect that made it go off continuously.

Plus, you have to remember to turn it on


And you have to remember to turn it off too ;-)
I seem to have a tough time remembering that one.
(Idilic scene: Morning light slanting through the trees, strolling out
to the pond with morning coffee in had for a bit of tranquility and
then.....)