Uber app is awesome, probably just cause you on a windows phone that its ***, no-one cares about developing good apps for windows.
Re- safety, I have never had a problem nor have any of my friends.
There was an incident or 2 in cape town regarding sketchy drivers but none in JHB. I would rather have my kids (in a group is much better) take uber than any other taxi company thats for sure.
-- Mike, if you in this situation again, a cool way of keeping track of them is if you order the uber for them on your phone (you can set the pickup pin to their location, just move it on the map). You can then track the drivers every move from pickup to drop off.