I took an Uber alone for the first time yesterday. I freaked out a little because the map showed me a location and the vehicle wasn't there. It was pouring rain, close to 2:00 AM, and I was on my own walking back and forth and trying to cross to the west side of the train station. I called him and the call dropped. Then he called me back and we sorted things out. 

Bit of a scary experience but I survived.