Last month I was went to South Kolkata from Dum Dum and I booked a Cab from Ola.
At the time of booking in the app show me the Price is around 300 RS. but when I leave the ride the driver said me that the price was 510 RS. It was so worst experience for me. The comfort of Ola Cabs are too poor they only used Swift Or Desire. The behaviour of the driver was too bad and he did not know the Route to reach the destination, he just follow the map. It was the worst experience with me, after that I only book Uber.