I looked into Graviton 2, ECS, and Fargate about a year ago. It works as advertised and for simple workloads it was 1/4 the price of anything I could get from Azure at the time.
I have since consolidated my infrastructure in Azure but the Graviton 2, ECS and Fargate stuff was neat.
The UI was A bit clunky, lots of clicks but the feature set is well thought out. Nice deployment options and exactly what I'd expect from a cloud provider.