We had a water powered backup, and I can say if you have a power outage due to storms, the water has no where to go, if you are downhill and where water will pool.
The mechanism used for backup won’t help unless it throws it outside your basement and not into the city pipes.
My concern is two fold, not many plumbers who I’ve talked to have ever installed and second, their lift capacity is limited. I have a 10’ lift from the top of my pit and that’s beyond the capability of a lot of water pumps. Mine is routed outside and have a good hill for it to run down so no danger of pooling.