Tried Uber a half dozen more times on my last trip to VN. Basically horrible!
On 2/3rds of the rides I waited for 5 to 10 minutes and then the driver cancelled before arriving.
On the few ride requests where the driver actually arrived, they were 3 or 4 times the estimated time, and they didn't come to the right location. I had to chase them down while looking on the map.
If I were to rate car/taxi service in HCMC, on scale of 10.
Mai Linh or Vinasun 8
Uber 1