It, as you know, requires longer development times. Many RA4 processors have a speed switch will accommodate the slower speed.
You probably know that it is backlit material. I think it is beautiful stuff. not everything looks good on it and the surface will scratch easily. It will need to be laminated to plexi, adhered or sandwiched in glass.
The is a another product called eduraclear which is also very cool it is a clear (non frosted) transparent material. I used this stuff at my last show.
The change from dura to endura is a result of Kodak changing their formula making it more archival.