In this talk I presented the technology behind the Fully Automated Store by Checkout Technologies. The current version of the store is the result of the work of 12 engineers that spans the areas from hardware and design to the ultimate deep learning architectures. The challenges and lessons learnt during this adventure will also be discussed, as well as what it means to deploy a system which has an AI engine at its core. The creation of the dataset and the invention of specific metrics capable of measuring the accuracy of the entire system will be discussed too.