That growth tactic - what a drag..

I agree though it's an abrupt moment to hit that popup. I think this kind of thing would work for certain things, however for a productivity tool for professionals - not so much.

Fake emails man. They're free.

What is there to try out? It looks like a pretty standard "kanban for gmail" idea. If you need more you either don't use workflow managers or don't have a very good imagination.

Though I'm not really seeing what makes it any better than existing GTD offerings that already exist for gmail, so I agree with you afa I'm not going to be recommending it to anyone; if they had anything more there I'm sure they'd've had a different screenshot.

Even if you have a good understanding of the idea and the functionality, the quality of the implementation is still important. Hard to get a complete sense of that without trying.