What are the key features of Coinbase one?

As a cryptocurrency enthusiast and investor, I'm always looking for innovative and secure platforms to manage my digital assets. Could you elaborate on the key features of Coinbase One that set it apart from other crypto services? Specifically, I'm interested in understanding its user interface, security measures, supported cryptocurrencies, and any additional benefits or perks it offers to its users. Additionally, how does Coinbase One compare to its competitors in terms of fees, transaction speeds, and customer support? I'd appreciate a detailed description that highlights the unique selling points of this platform.