I've been using this for a while for my personal tasks and just discovered Shared Lists. There are some great features here and I could see us using this a lot in my team.
However the app really needs more keyboard shortcuts. The 12 shortcuts currently available are not enough for a keyboard driven workflow and are paltry compared to the number of keyboard shortcuts usually available in other Microsoft apps. (For example I'm a power user of Excel and I am competely keyboard driven without ever using the mouse at all.)
Otherwise I really like so please prioritise those Keyboard Shortcuts!