This feature is very helpful because it means that one can divide the code into sections with only the headings showing. The following features would make this work much better:
1) When the folded area is expanded the green colour background of the title should not disappear.
2) One-button insertion of block comments - perhaps from a button in the gutter - would be helpful, so that one could easily switch a block of code in and out. Without this, we have to expand the code, select it, put in the /* */ and then fold it again.