Looker

For your developers, the customer service is superior. They also do a great job reaching out to your primary users. With respect to frontend users, those using it for simpler data retrieval/review, their interface is rather easy to use and logical to work through. They do a lot to make the system as simple as possible. Only your BI developers and/or data engineering team can clutter the space.

If you decide to purchase the non-customized version, the color palette Looker uses is rather bland (More noticeable to executives and heavy users-most users will be fine with it though). The company's integrations are rather limited, but supposed to improve with Looker 5 (via the Action Hub). However, it seems that most integrations will require purchasing from third parties, instead of being a Looker hosted and "controlled" solution you purchase through them. That complicates the process.

The option to pull a lot of data in an organized fashion.

This software RARELY works, it's completely glitchy. I use it, well, I attempt to use it, daily. But I continuously receive the No Date to Report message. It completely hinders my job as I need the data from the reporting. Seriously, it is glitchy every single day.

Looker is a great tool for KPIs and data visualization. It's powerful enough to handle many large queries and return simplified dashboards for end users.

There is certainly a learning curve to using Looker and some of the shortcoming in "and/or" filtering make the need to leverage custom filters even higher.

Looker has a very professional and easy interface to access and the ability to manage multiple marketing channels through Looker functions is excellent.
This platform reporting capability is on top and incredible leads management software and very easy to integrate to other platforms.

I have nothing to underline as a problem from the Looker functionalities, and the training when new to the tool is effective.