BIGGEST PROBLEM WAS INSTALLATION. DIFICULTY WITH ATTACHING UNIT TO SINK BECAUSE THE UNITS FLANGE RUBBER SEALER EXPANDS WHEN PUT UNDER PRESSURE AND BLOCKS THE INSERTION OFTHE LOCKING NOIDS IN THE SLOT.FINALLY RESORTED TO SILICONE AND REVERSAL OF THE RUBBER SEALER. SHOULD HAVE BEEN SIMPLE CONNECTION. TOOK OVER 30 MINUTES TO FIGURE A WAY AROUND THE PROBLEM