Just got back from a trip where I borrowed a V1 for the week with good results. Drove from Seattle through Oregon, to Twin Falls Idaho, to Las Vegas, to the Grand Canyon, to Sedona, to Phoenix, to Joshua Tree, to Palm Springs, to Southern California, to San Fancisco and back to Seattle. I can say that the detector did help in every state and on every interstate. Laser only went off one time, where I did get a bounce first before I was tagged. I am not sure if the detector actually saved me, but it did help me be more aware.
My wife thought it was great. Needless to say, I am getting a V1 for Christmas!