I don't think it's been brought in this thread, I know I've mentioned it several times in other threads, but just a quick FYI: Escort and Beltronics are the same company. I have the RX65 an it works just fine. Its also got the same internals with the x50. Basically the same unit. The Beltronics STi won't do any better job than a RX65/x50, but it's undetectable by RDD (Radar Detector-Detector). But if you don't live in a state where RD's are illegal then it's kind of a waste. Or also if your a truck driver (in all 50 states).
V1, I'm sure its a great RD but IMO it's also a "word-of-mouth" thing. Everyone say it's great, therefore it is. Its like when people ask what's a good GPS and most people say Garmin. Yet there are plenty of other GPS companies with units that work just as good.
V1 has those arrows and points out where it's coming from. I guess that's a bonus. But honestly, if a RD goes off, I let off the gas and behave accordingly. I'm NOT going to look first (at the arrows) then react. Because if I did...it's too late. All I know is...that thing goes off and I back off to speed limit until I stops. That's all it matters. Doesn't matter where he is.