So... I have had this faucet for 3 months and replaced the batteries twice. upon the 2nd battery replacement the battery pack (cheap plastic) broke. Delta was super nice and sent a new solenoid, but honestly it is more trouble than it is worth. If it was a wave faucet I might consider the cost and trouble.  I have the wave soap dispensers from xo all over the house and save money on soap. The design and chrome finish of the faucet itself is top notch and I was able to bypass the solenoid and use as an old fashion (ha ha) faucet.