Product review (5 stars): Brilliant... without removing old gasket !
This is a great product.  However,  it would be nice if the supplier made it clear that the spring tension clip was to be inserted in the gasket and then simply placed in the sink opening (through top of sink) and seated by firmly stopping up the sink with the rubber closure.  I placed it directly over the old splash guard and now it works great and is much quieter.  True, the water isn't sucked down instantly as before but that's a small price to pay for safety.