It was a pain in the ass item. I'm basically just saying what everyone else is saying. There wasn't anything creative or unique about it, it just caused a gigantic and annoying explosion, and people abused the hell out of it. I especially loved the people who would fire it multiple times, complain about the lag, then fire it some more, then complain about the lag, completely unaware that they were causing the problem.
The fact that it destroyed any brick was annoying too. I liked being able to build shelters. The mini nuke ruined that.