Store TaskFlow Input Param in Memory Scope or Managed Bean?

If we need to specify some input parameters for our Bounded task flow then, we can specify value (Note: the value field in Input parameter definition indicates the location where the input parameter will be stored. It does not indicate the value of  the parameter we are defining.) either using managed bean or in memory scope. The recommended way is to use managed bean or a simple pojo class configured as manged bean in a memory scope. The reason of using managed bean is that we can use comments in our class file to indicate the purpose for other developers and also make it clear what exactly the input parameters are and where they are stored as they can now be access using managed bean.