exDreamweaver user here.

I liked how CS3 version automatically closed out the opened HTML tag to make it XHTML valid code.

for example:

<div >
<span >
<dd> something </dd>
</ *X

At Point X it finished the tag as </span.

Or in case of tags that don't have closing tags, such as input, when typing the ">" close bracket, it replaced it with "/>".

Saves alot of time and frustration when you have an HTML file hundreds of div tags and you have to find out which one is not closed.