Maybe. However I have seen that a quality radar detector that I use now is much better than the lesser ones out there. I know that it won't prevent tickets as there is only 1 cure for that and its not speeding, but it warns me much further and can even pick up when cops are over hills.
BTW I am using an Escort 8500 X50
+1. My escort is great for long drives where I typically average 5 over.... just enough to get a ticket. It isn't perfect but it is another tool to keep me a little more aware of what is going on.