I’m much with the two posters above.
It sounds great on paper with the slicing, buffers, terrain database, etc. but in reality it can’t tell the difference between a bit of rough ground and a cu-nim. The 40nm changeover is uselessly close and on a clear CAVOK day you get blobs all over the place but on a dark and !!!!!ty night with lightning flickering all around there’s nothing to see.
Once I actually gave up with it and followed another aircraft with a lower tech radar through a massive area of red, in the middle of which you could see the ground.
Maybe they’ll update the software or something but I take extra fuel when I fly an aircraft fitted with it. Most of the time you just don’t know if you’re looking at an artefact or something real, so you go waaaay off course, just to be safe.