Ask HN: Do you use Tableau Software? Opinions?

I bookmarked Tableau software a while back as I've heard it being constantly mentioned on various websites as great tool to use.

I remember it being labeled as vital in understanding one's analytics and gives a different perspective in breaking down the specific business numbers.

Has anyone used it firsthand? Especially with their IPO coming up, I'm trying to get HN's opinion on the long term viability of this company.

Thanks