Recently I had a severely delayed flight that didn't land until after 1am, and was by far the last flight into my podunk airport. My apps showed a 3 minute pickup time from Uber and a 20 minute time from Lyft, so I booked a ride with Uber. After 3-5 minutes of "this is taking longer than expected", it finally found a driver, and the pickup time wound up being 20 minutes (just like Lyft). So I cancelled and got into a waiting cab and was home by the time the Uber would have picked me up.
If Uber would have just been honest about the pickup time, I would have never booked a ride and would not have wasted some poor driver's time when he got the ride request. This also delayed me by 3-5 minutes (the matching time on the app), which irritated me. I'm gradually being conditioned to not trust Uber, and to just use Lyft and Taxis..