Not once, it happened three or four time with me.
Whenever I try for booking a cab, it always shows 3x rates will be applicable in place of normal fares, its okay when in case of unavailability of cabs but if there are other cabs why would I pay more for this.
I tried booking a cab, on app it shows the availability pf cabs around me but the instance I put on a coupon or some discount code suddenly it start showing no cabs available.
I booked a cab, in 3x higher rates as I was to reach as soon as pooible, but the driver cancelled the ride not only once, my ride was cancelled twice or thrice.
And the major fraud of uber, it always shows that I have two or three refferal coupons in my account which I can use in my further rides and even uber also messages me in my inbox and remind me of my coupons,
BUT when ever I apply any of the coupon it always show COUPON CAN NOT BE APPLIED.
Finally disappointed. And deleted the app.