I used to use a radar detector, and it saved me from tickets many times.
Since I now live in Virginia, which is one of the few places in the US that radar detectors are illegal, I no longer use mine. Cruise control and paying attention to speed limit signs has worked well. I'm actually finding it more relaxing to keep my speed to the speed limit or five miles over.
The state police, at least in this part of Virginia, seem to not pay attention to anyone going within nine miles of the speed limit, at least on the highways.
As for a dash cam, I'm seriously considering getting one, if for no other reason than to record the interesting things that I see in my travels.
Whenever I drive through VA, I always unplug my Radar Detector, so I don’t get caught by a Radar Detector Detector lol…
Waze is great thing to have running in the background with or without a Radar Detector. It’s probably WAY more effective than Laser (since you are usually caught when if your detector goes off). On road trips, I use both.