"I have experience with a similar product, the Monroy ATD-200 and -300"
I don't consider it "similar" at all. The Monroy doesn't work in my
opinion. None of these devices dating back to Terra are anywhere near
TCAS or TIS, but I do agree with these "after-market" makers that a
simple system that gives us a "heads-up" for rock bottom price is good.
GA needs affordable CAS. Unfortunately, the Monroy system doesn't
measure up at all. There are brief instances where it does work, but
the overwhelming majority of the time it was a noise meter. It detects
when I retract my flaps and contact ground on 121.8 very well, where
the trafficscope seems to focus on traffic and give much more accurate
results.