Just finished the install of mine. For the TL;DR crowd - it was pretty straightforward and it's a beautiful bit of kit.
Overall very happy with it. The quality of the two parts is extremely good, but with shipping the cost is close to $50 for both. I also bought black anodized screws for the total black-out effect.
As mentioned, it's a bit tricky getting enough of the hose pulled out to seat the barb of the flange. I used a long needle-nosed pliers and gently worked it out. Was surprised to find a screw-type hose clamp on the hose as there is very little pressure. I reinstalled the hose clamp, figured better safe than sorry. It looked like FWC had used plumber's putty as the sealant so that's what I used.
The action of the valve is incredibly smooth, I spent a good 10 minutes just turning it on and off. Good thing the drought is over, I probably wasted 5 gallons of water.
When the valve is off, the door clears it easily. When the valve is on, the door will contact the valve if the door "stay open" latch is not used. It is possible that if the valve were on and the door was opened violently, it would hit and possibly damage the valve. I think this is low risk as the valve is off most of the time.
Some pics:
Valve 1.jpgValve 2.jpgValve 3.jpgValve 4.jpg