Not all but some ola cab driver are rude, revently I took cab for Khan Market which is approx 15 km from shahdara and estimate cost was 180 to 210, and when we reached seelampum driver said trip is stoped by some servel problem and I have to pay 114 rupees for just 4 km. Then I said talk to your service provider as I am not going to pay this amount then he started talking rudely then I paid that and I filed a complaint but ola didnt took any action against it or didnt care to revert me.
And sometimes they charged 70 to 80 above their estimate calculation of ride. And other cabs provider charged you less then this, then why one have to pay more for same facility.
And most of the tour guides are only dependent on the GPS. Thy even dont know the famous places route of the city.
Although cabs are good, variety are their u can choose according to your pocket micro. Mini, sadan, luxery etc.