This valve is wonderful, functionality, but durability is sorely lacking since the faucet starts dripping after a couple years.  The valve has been disassembled a couple times over the course of 4 years to lubricate, thereby stopping the faucet from dripping.  But now, after 5 years, the valve leaks around the edges and water runs under the sink.  This would not be such an inconvenience if Delta actually stocked these valves.  Even worse, Delta advertises these valves as being in stock, when in fact they are built on demand.