Yep. My sister had the tracker because her insurance required it, and it was a complete nightmare. They threatened to cancel her insurance multiple times due to "dangerous speeding", after calling them they would say the tracker registered her driving 70mph in a 20mph zone, so we would request they send the data proving so.....and every single time, the tracker would register her driving on a small 20mph road going underneath a motorway where she was actually driving doing a legal 70mph. I mean, just looking at the GPS trace it was obvious that she was on the motorway for the last 50 miles, and now for that one read she was on a smaller road crossing the motorway? She would have had to teleport to do that.
As for the G-force tracker - it's also shit, she was getting points docked constantly for "smoothness" of driving, because every time you went through a speed bump the tracker would register "abrupt braking event" and recommend "smoother braking for better scores". It was such a shit system that she willingly paid 2x the premium on her next insurance to not have a tracker.