"Tarif" writes:

What about false alarms. Do you get a lot of those?

I assume you mean traffic alarms. No, all the alarms I've ever
received were due to actual nearby airplanes, not due to something
weird like echoes from the aircraft itself. Exact range and altitude
plus good bearing makes it easy to spot traffic or self-separate if
necessary.

(The MFD also provides alarms about stormscope cells or radar echoes
ahead, but I don't think that's what you meant.)

- FChE