The ability to see the actual code that is being run as it is being built. It is a lot easier to debug and troubleshoot issues when you can see the actual code that is being run. I dislike that you can only see the code that is being run on the server. It is nice to be able to see the code that is running on your local machine. I would like to be able to see the code that is running on my local machine as well. I am able to debug and troubleshoot issues much quicker because I can see the actual code that is being run.