Wears out quickly
It worked great for a little while.  But the button wore out after a short time.  The button is really just a little flap of rubber or silicone.  When you press on the flap, there is a lever behind it that opens a valve in the bottom and soap is dispensed.  When the flap wears out, soap starts leaking out when it's sitting on the edge of the sink.
Rating: 1 stars