We all have it turned on but I'm not sure anyone is using it particularly actively. It's actually a bone of contention with DS - his view is that if we want to know where he is, we should look at Life 360. My view is that Life360 is for emergencies and I'd far rather get a quick text saying, "off to play golf with Andy". 
Similarly, DH is NOTORIOUS for not answering his phone because it's almost permanently on silent so it's helpful to know where he is occassionally if I need something. If I can see he's in the car, I can ring him and it will ring via his car radio and he'll actually answer!
Having said that, there's no doubt that if a relationship has even a hint of control - whether driven by pure abusive tendencies or insecurities - location tracking is a terrible thing. I can easily see exBIL, for example, would have given SIL a hard time if she said she was coming to our house and then her tracking app showed she was in the park nearby "I thought you were at Fraser's house? Why did you go to the park? Who were you with? Were you scoring drugs? Meeting a man!?" etc, when in reality, we would have been there with the kids to go on the swings.
I honestly can't think of a situation in the years we'v ehad location sharing on our phones, where either DH or I have noticed, cared or asked a question like, "why were you at XX place".