Remove mentions of generated code + reworded last paragraph

Author: jatcwang

tutorials/tour/case-classes.md

@@ -76,8 +76,7 @@ They are equal!
 SMS is: SMS(12345, Hello!)
 ```
 
-With Case Classes, all the necessary machinery required for using them in **Pattern Matching** is automatically generated by the compiler.
-Here's a function that prints out different messages depending on what type of Notification is received:
+With Case Classes, you can utilize **Pattern Matching** to work with your data. Here's a function that prints out different messages depending on what type of Notification is received:
 
 ```tut
 def showNotification(notification: Notification): String = {
@@ -131,7 +130,10 @@ val specialSms = SMS("55555", "I'm here! Where are you?")
 
 ```
 
-_Case Classes_ is one of the biggest reasons why Scala code can be both concise and readable. With immutability and structural equality, working with 
-case classes are just like working with primative values (Int, Double, etc), which in turn makes writing programs in a functional style much simpler
-and intuitive.
+When programming in Scala, it is recommended that you use Case Classes pervasively to model/group data as they help you to write more expressive and maintainable code:
+
+* Immutability frees you from needing to keep track of where and when things are mutated
+* Comparison-by-value allows you compare instances as if they are primitive values - no more uncertainty regarding whether instances of a class is compared by value or reference
+* Pattern Matching makes branching logic simpler, which means less bugs and more readable code. 
+