Product review (5 stars): Couldn't be better
I read the reviews about this product.  I was concerned about the "Solenoid not included" comment so I email the company.  They quickly responded that the solenoid was included.  I ordered the product.  It does not come with instruction but there are only two wires and an in/out for the water which is marked with an arrow.  Hard to screw up!  Took me 20 minutes to install - mainly because it's hard to reach behind the water heater.

Bottom line - easy to install, stopped the leak problem I had with the original part.  What else could you ask for?