The user interface is generally straightforward, but it involves a combination of different products in the background. One complexity arises when interfacing with Active Directory, especially when bridging AWS and Azure. AWS makes assumptions, while Azure's Active Directory can be highly customized. In many cases, companies have diverse Active Directory setups due to mergers, making it challenging to connect AWS to Azure seamlessly. Improvement could be made in handling the variety of Active Directory configurations, considering that companies often have a mix of settings rather than a single standardized setup. Activating Control Tower is straightforward, and it should be done before creating AWS accounts. In an existing AWS implementation, activating Control Tower can be impactful, as previous builds might lack control over guardrails and security settings implemented in Control Tower. This could lead to disruptions in working environments, and it is recommended to either create Control Tower at the beginning of a project or set it up alongside existing environments. Verifying that everything works before transitioning to production is crucial to avoid the high risk of disruptions in the production environment.