I have to travel a lot in my job so I generally book cabs for airport transfers. I used to give booking to meru cabs as they are available in many cities. They are good in service and cars they provide are also good in condition. They are having fast and perfect drivers.
But what I found is they are bit expensive than others. Now a days there are many cab service providers running in major cities. I have tried most of them and one way or other they all are same. Although some points are good in meru cabs but when it comes to money they are at higher side. If you want to use cheap cab services there are many providers these days. So not considering much only disadvantage with meru is they are costly than others.