This pump is amazing!
We used to have ponds that stay few days after the rain, which resulted a huge muddy area (and killed our grass...)
After installing this pump (along with french drain - see tons of videos on Youtube about that), the ponds are gone...
The pump starts automatically when the basin starts filling and stops when it empties. It is pretty quiet as well.
In the pictures you can see the amount of water we had today (this is during Isaias...) and about an hour after the rain stopped - simply amazing...
We should have bought this pump years ago...