On Saturday October 2nd I tried to reserve a car for the evening, impossible. I tried several times.
I then tried to get a ride the moment I needed it: 26,51 euro from Delft to Rotterdam, nobody took the ride.
I refreshed and the lowest price went up to 55 euro, I refreshed and the lowest price went up to 94 euro.
I used Uber in Paris and there it works quite well, here it is utterly useless. I was prepared for this to happen and arranged a back up plan. But my evening would have been destroyed by Uber if I only depended on this crap service.