I like how easy it is for us as an agency/publisher that works with clients who own ad spaces in other sites or networks (like Bing).
It's very important from my perspective because we are trying build more brand affinity between Google & Microsoft properties - which means they need some advertising love too! There have been times where there was no response at all when submitting ads into ADREADY via API callbacks after approval process has completed successfully within GCP account dashboard page but overall this tool does what needs doing without any issues so far.