This faucet looks great, but does not function.  When you change the spray function the buttons get stuck and then the water flow is significantly reduced, sometimes completely shut off.    Kohler will not give you a refund or a credit for a new faucet.  They will send new parts but their "fix" does not work either.  I have been getting this repaired for 18 months now.  I will now buying a new faucet from a competitor.