What do you like best?
Tableau is a highly advanced data visualization tool that vastly improves meetings and client deliverables. Tableau takes the data inputted and can alter it to be different graphs and images that you can customize to make your point more clearly come across to your audience. The impact made with the visualization tools versus simply looking at a spreadsheet of data helps you emphasize whatever point you are trying to make whether it is geographical information, sales numbers, or qualitative data Tableau makes it easier to understand and look clean and professional at the same time.
What do you dislike?
Tableau has a lot of different tools to offer and is very customizable to what you have in mind - that being said it takes time to learn and mess around with to fully understand how to customize things in the correct manner. It requires a large amount of onboarding and self teaching but in the end the product you can create is well worth it.
What problems are you solving with the product? What benefits have you realized?
Tableau solves the problem of making the data you are trying to present visual. They are able to alter the settings so that the message of your data is more clear to the audience.