Update index.md

Author: taowen

index.md

@@ -17,7 +17,7 @@ Jsoniter Golang version could be more than **6x** times faster than standard lib
 
 For more complete report you can checkout the full [benchmark](/benchmark.html) with [in-depth optimization](/benchmark.html#optimization-used) to back the numbers up
 
-# Cut the Crap!
+# Unique Experience
 
 Jsoniter gets things done, as fast as possible. Most common use case is just one line:
 
@@ -29,6 +29,8 @@ JsonStream.serialize(new int[]{1,2,3}); // from object to JSON
 JsonIterator.deserialize("[1,2,3]", int[].class); // from JSON to object, with class specified
 ```
 
+This is what a mediocre parser can do. Jsoniter is born from real-world anger to solve the impedance mismatch between JSON the Java language. To understand what kind of unique experience Jsoniter can provide, let's compare with existing parser api.
+
 According to your past experience, you must know the following code will be very slow and cumbersome:
 
 ```java