Does it record when you are over speed limitAgree if it ain't working for you or you haven't set it up don't worry it's not the end of the world. You've pretty much summed it up really, decent to check range left of fuel out of the car and it does seem pretty reliable from my use so far. I used the ' horn and turn signals' feature just to see if it would work. ( It doesn't exactly get lost amongst cars in the car park ha). The other decent feature which I can see would be some use is the map and directions back to your car. So if you went somewhere you had never been before and weren't sure which direction your car was you can follow GPS to it.
The app did tell me that I had left my lights on and I went and checked and it was right I had manually overwritten the 'auto' lights on the console but with these modern cars anyway they turn themselves off to save the battery.? Long gone are the days where your battery becomes flat because you have left your lights on..
You can study your mpg on each individual drive as well and set the ventilation/ pre heating which will be useful on a frosty day but I've not played with these features properly yet.