Agreed, anything other than the V-1 is a waste of money. I had a Whistler, but it was good only for entertainment and impressing teens. I have saved myself from tickets by being alert, especially when they use laser. The Whistler saved me once, and that was the day after I got it, it was useless for the next two years when I always saw the coppers before it went off, and then I just quit using it altogether.
As always, YMMV