For the price, you'd think this would be a top of the line faucet.  But here we are, 4 years later struggling to get this thing tightened.  It is installed with a farmhouse sink, which makes it incredibly difficult to work with.  But even that aside, why is this coming loose to begin with?  Most of the underneath is plastic, so it isn't wearing well.  Also, the touch on/off feature seemed cool at first, but it is kind of annoying and takes quite a few batteries to work.  It also stays in the "on" position unless you tap it to turn it off.  If you forget, you'll just waste a lot of batteries.  I wish I would have just gotten a normal pull down faucet.