Those things are very illegal here in Canada....if you get pulled over and one is found, it gets confiscated, a hefty fine and I think 3 points... and 100 lashings in a public square....well, maybe they stopped the public lashings this year LOL.
I used to have a Uniden with VG2 undetectable, and never GOT detected...worked fine.....I use a different radar detector nowadays: I never exceed the speed limit beyond 9km, at 10 over they will ticket you!