The rating system is completely vacuous. Not only does it lack transparency, but it is often outright incorrect. ie; I received a weekly summary for one week, which stated I fell below my city average (4.79) which never seems to change, but that is another story altogether. Anyways, the weekly summary stated that I did 24 trips, 22 of which were rated 5 star, but my weekly average was 4.64. Off the top, that didn't seem right. If the other two trips were a 1 star the average would still be 4.66 not 4.64. Also, I thought that any rated 1 star prompted some type of action on Uber's part, ie; notice or email, but I never received anything. Anyways, I wrote to UBER notifying them that their average could not possibly correct. Their response was to blow me off suggesting that until 500 trips are completed, the rating is not especially salient. I doubt I will keep doing this before I approach anywhere near 500 trips, but this is just an example how even their basic arithmetic can be off, yet they are using this rating to de-activate drivers. This rating can be manipulated by UBER five ways to Sunday and the driver never sees a thing. UBER discovers a driver that is criticizing them publicly, rather then deactivate them immediately which they have done in the past, and been sued over, the driver can watch his rating drop precipitously until he or she is kicked to the curb.