I bought a Valentine V1 when I got my MS3. It is a great detector, very sensitive, gives lots of information about what is around you.
But, you have to pay attention to it because like most detectors, it alerts on lots of things that are not of concern. You can tell them apart because of the information it gives you, but you have to pay attention. You can disable bands that are not used by LE which cuts down on the falses.
So... I have just ordered an Excort 9500i. It includes a GPS and allows you to teach it the location and frequency of false alarms like door openers, school speed indicators, freeway speed monitors, etc.
My Valentine will be up for sale in a couple of weeks when the Escort arrives.