I like how easy it makes finding issues with my web app because all you need to do is put your breakpoint there and run it.
It's not as good if its just one line that has an issue but when multiple lines have problems then things get much easier! You don't always know what will happen so sometimes this can be hard to predict. If i'm working alone or doing something small then maybe I could see some benefit. But usually we're using other people too which means more than 1 person would probably help us out here! We've been able to find many minor issues over our website/web application (where previously none were found).