Just signed up and love the "Group tasks" in calendar functionality, it' something I've been hoping someone would crash, which you did. The only thing right now that makes my experience feel a friction is THE DESIGN. Come one guys, bump this up to a more professional level. Everything is sooo small, almost unreadable. And no contrast in colors makes being in that environment dull.
Just my two cents. Sort this and you are on your way to a great tool.