Easy, intuitive interface that makes it easy even without any technical knowledge or background in software development /architecture/design etc; great support team available 24*7 via chat & email (I have never needed them but they are there); very friendly community of users who share their experience across different forums online which helps you learn new things from other experienced members every day! I don't think anything specific at this moment as everything looks good so far though nothing really stands out yet - still exploring options here since my needs were not met by open source products like ArgoUML before :) We use ARGO ULMl mainly because we had no way back then using our own tools while working remotely together through Slack channel all over India where people speak various languages including Hindi language too ;).