This is a very nice idea to travel in low price but there is difference in price on same way. This service is good and you can ride in low price by cab but there is no fix price for travel. its depend on cab driver how much he will say to pay.
But there is problem is may be some time yu have to face few problem like:
timing match is a big problem.
there is no surety how will driver treat you.
may be you will not feel comfort with this service.
its best for it you traveling alone. its cab service in cheap price.