This is my first plane with a stormscope, and I find the display of the strikes to be fairly accurate. I’ve herd about radial spread, which as I understand it makes very powerful or numerous strikes appear to be closer than they really are.
I have never measured the distance to the strikes, (I just haven’t found out how to), but my display appears to be very accurate. In circumstances when a CB was very visible, the azimuth was clearly within a few degrees and the distance was arguably correct.
I tend to use my device for more strategic guidance as opposed to trying to thread my way between numerous, closely spaced storms, so if the distance is off a bit, it is not a major factor (for me).
the biggest ‘error’ I’ve found is that it has occasionally shown a single hit that I am confident is not there. I do not know if it is from static buildups which are clearly not result of lightning or from some other source of electrical interference. I a fairly confident that it is not from within the aircraft as there have been no consistent false replies.
Overall, I am very happy. I have it set up so that I display the strikes on both the ARNAV and the Sandel. I use one for longer range (150 -200 NMs) viewing and the other for short range (25-100) viewing. This also alerts me if there are any problems in the system.