So far my Dually valves have been there 2 weeks. no sign of leaking. Only issue is the tire store now has a "Divit" in their parking lot (They goofed and . Well it's funny now.. Was not at the time but no damage save to the asphalt)
Look good. Work good. And checking tire pressure or adding air is easier than it is on my car. Can't beat that. .No wrench needed.
These are teh "Solid valve stems" folks talk about they are custom made for your make of vehicle (proper bends and so on or so they think.. one of mine needed a bit of "Adjustment" but not a problem.