I like it. It lets me see all the items at a higher level. The best part so far is that I can move groups into one another.

Using it quickly makes me want a couple of features:

- not needing drag n drop for something (like creating a new task or group - be default putting them in the previous group or top level)

- being able to add tasks that are at the intersection of two groups. I imagine this would look something like a venn-diagram.

Finally, I am reluctant to support a startup unless I know how you are planning to survive. Is it going to be advertisement? not yet release feature? large teams? Once you do this, I will be more comfortable telling others.