The replacement job is very easy, just follow the included instructions. Make sure the manual override lever is in the MAN position on the old valve before removing it, and make sure the override lever on the new valve is also in the MAN position before installing it.The end-switch in the new valve is the new style, so when it eventually fails you'll have to replace the whole head, not just the faulty switch. The new style switch is no longer available as an individual replacement part.My only real complaint is the strain relief is a complete hack. Looking at the pictures you can see the original head on the left with a nice, well-fitted strain relief. On the right is the new head. It has a hugely over-sized hole that the strain relief doesn't even come close to filling. I suppose it probably does the job of strain relief, but it really doesn't protect the wires from the sharp edges of the sheet metal.

These valves are not that relaiable, but this upper housing has the parts that fail the most often. I keep an extra on hand.

Worked as advertised