It's was not challanging. Unless you call spending time just flying over a surface looking in the likely spots for hours challanging. I suppose it was a challenge to not die of boredom, but I don't think that's a good thing.It wasnt impossible, it was difficult. I had no idea you could turn the gfx down and i still found stuff, plenty of players did. It was a challenge to be mastered. Its a shame they didnt let players put a name tag on the landmarks tbh.
While I like the probes mini-game, it should not result in pinpoint coordinates there should have been search locations. Then there could be an optional wave scanner module which you could fit which would help you pinpoint these places or you could use the MK1 eyeball if you so wished. You get the pinpoint coordinates after using the composition scanner at the POI.