Asp.net Mvc

It is very successful. New framework is having good features as well

http://www.webdevelopmenthelp.net/2013/10/difference-between-asp-net-webform-and-asp-net-mvc.html

Hi Dhaval,

Hope this will be helpful to give you more detailed insight in addition to "its successful" or "widely used".

http://www.c-sharpcorner.com/UploadFile/84c85b/is-mvc-replacing-Asp-Net/

Yes,

This is very successful because this is very light as compare to web form.

Yes....
It is very stable at this moment.

Current trend is to use client side MVC or MVVM pattern like AngularJs, etc.

In my point of view APS.NET MVC is the one of the greatest success in the Microsoft technology because of it's architecture.