The need of cabs are very useful now a days .specially in the cities where the taxi is not too much in number.the ola is doing a good online job.it is also a good example of digital India. .where you can call a taxi by the app. Oh .but in another hand it is too expensive also.this is what I really personally feel.but some times it is also very helpful with comparing to other company of online vehicle the ola is no.1 I think.good job ola.