I have been using CodeSmith over 3 years. I really love it. If the following features could be added, it would be much better.
1. "Comment out the selected lines" and "Uncomment selected lines"
2. "Navigate Back" and "Navigate Forward"
3. Integrate MSDN help.
4. Highlight current line (like in Editplus)
5. Macros support (like in Editplus or Visual Studio)
6. Allow customize "Insert Content"
Thanks