The following views from the China Forum (http://bbs.kafan.cn/forum-38-1.html)
1 CIS4 interface more user-friendly - fewer pop-up warnings are conducive to more users (novice and non-professional users),they will like and use it
2 CIS4 have even better global rules
3 It looks like that CIS enthusiast (Senior more professional users) is more like the CIS3, because they feel comfortable with the “full control” feeling, Oh, they are used to use CIS3 
In addition, when I put CIS introduced to my friends, all of them was surprised by the power of the CIS . What a great software! :-TU
Forgive my bad English, hope you can understand what I mean