At the home center I saw an above ground system to add a basement bath that says it requires no floor breaking?
This is correct, but some things to consider are that you have to step up one stair to get in the bath, many basements simply do not have the head room and this tends to look like a poorly planned add-on. And because the unit is not deep, the pump in the unit (needed to lift the waste water up and out) will cycle more often as compared to a deep ejector pit.
