A radar detector and/or laser jammer/deflector (whatever) can potentially help you avoid getting a ticket, no denying that. For the most part, though, if you do get a speeding ticket, don't lose hope. The one thing you need to keep in mind is that the officer needs to get many, many things to happen without error in order to have a solid case against you. You, on the other hand, need only have one of those many things be called into doubt and/or go wrong. At the very least, you should be able to get the points eliminated and keep your driving record clean.
Check out this page and you'll see what I mean.