Is it possible to give them 0 stars?
1) It seems to be impossible to get them go honor their $20 off your first ride promotion despite 2 days worth of emails back and forth.
2) I used the app to get a ride on a 110 degree day. Their app told me that my location was somwhere that I had never been and I got a message "Your GPS location does not correspond with your location" WTF? If you know my GPS location YOU KNOW WHERE I AM YOU CRETINS! And if you are still confused have a driver call or text me!
Needless to say I will never use them again. Oh and if anyone from UBER is reading this, I have a copy of my email correspondence with them and you are welcome to have it and use it in a comercial.