I have K40 and Valentine 1 and Cobra on my cars. The best is V1 no question about it. Don't spend your money on anything else. Yes, laser is done deal but you still might get lucky and slow down. There are not too many cops that have laser. This will save you many tickets and you will be happy you have it on your car. I don't ride without having one on my car. Sometimes you are speeding and you don't even know it and one X alert not K will slow you down as well. On Cobra models you will have Emergency Vehicles approaching alert if you don't hear their horn because your windows are closed and you have loud music and partying with your car in the car lol, your cobra will let you know they are coming. With V1 the arrows will tell you which directions cops are pointing at you. Radar can’t get you from sides, it has to be from front or back. Just get one better then not having one.