I am going to be putting one on my truck in the same location very soon. My plastic McMaster one broke and caused my wife to break down. More Here
As for use of the valve in general: its the same valve that a number of "converters" are now using. I just got it modified to provide sealed wire leads. Not that that means anything in and of itself but they are in fairly wide use. In general speak they look to be a pretty nice valve with aluminum body and large porting.
I guarantee/warranty them.