Various features are valuable. It is intuitive; Tableau have been investing and releasing regularly. A tech-savvy business person can run with Tableau if they have a decent DWH and engineer supporting it. Access rights can quickly get out of hand, but with Tableau's UI and a tech-savvy business person committed to using the product, they can take charge and not have to rely on the tech team.
Improvements to My Organization:
It is helping to make Makerbot a data-driven company.
Room for Improvement:
A simple mode for new/occasional users might be helpful. Occasional users will always have trouble coping with such a feature-rich product. Unless you are using it every day, and it is crucial for at least part of your job, the learning curve never flattens out. A simpler "mode" which removes many of the more complex features or just hides them in tool "ribbons" might present a less-daunting interface to aid adoption by the vast majority of users.
Use of Solution:
I have used it for four years (released ~5-10 years ago).
I have not encountered any deployment issues.
I have not encountered any stability issues.
I have not encountered any scalability issues.
Customer service is good.
Technical support is good.
Domo: inflexible due to lack of expertise and confusing with blurred demarcation between DWH, ETL and BI layers.
Initial setup was straightforward.
We achieved ROI in <1 year.
Cost and Licensing Advice:
Don't buy licenses until there is actual demand - buy a couple of full desktops and a couple of cloud licenses and grow from there ONLY when you have tables/reports/dashboards for users.
Other Solutions Considered:
We also evaluated Domo and QlikView.
Start ASAP with a tiny cohort of hungry users; let them drive it.
Disclosure: I am a real user, and this review is based on my own experience and opinions.