It's easy to use, there are many themes available (which can be easily changed), it has an option of adding custom cards as well which makes customization very easier than other apps like Asana or Jira that I have used in past projects.
The UI could look more modernized but then again this might just depend upon my personal preference so no complaints here! Nothing really specific about elegantT - though if you're looking out for something customizable with loads of features try using another tool rather than buying one because they tend not too give much value when compared to their price tag. We were solving our task management problems by having all project-related information within single place instead of keeping them scattered across different tools/apps.