one thing to keep in mind is that no radar detector is perfect.

they'll increase your chances of detecting the cops, but that
doesn't mean you'll always get them.

if they find a perfect spot behind a curve/hill/bridge, you can be
busted or if they use instant on at night, you can be busted
no matter what detector you have.
(both happened to me and I have a V1)

all that said, a good detector is very useful, just you should
know what to expect.
I'd say a good detector might half the number of your tickets,
but it won't eliminate them completely.
on the other hand (in my experience) cops tend to be more stern
if they see that you have one. practice stashing it under the seat
in 0.1 seconds

T.