The ETL component allows us to pull from many different sources, making pulling data in easy.
Its break-even is only two years.
Costs are a little high on the license/token side. However, if you look at the TCO, it is not too bad, particularly against Power BI.
We been using Qlik Sense Enterprise for two and a half years. It has been one of the best decisions we made. We were suffering form trapped data and multiple sources both inside and outside of the firewall. We needed something with a powerful (yet easy to understand and use) ETL component, and this fit the bill.