Pros
It was a new startup that was motivating and give to exposure.
Cons
Lack of transparency. People should know what are they working on and not just keep hidden secrets. I was given a task and was told that this is just a hiring task and main task will be later. But then, they kept on dragging and making changes to it only, finally after 2 months I came to know that this was the task only and all the time they were making a fool of me.