There are three outputs. LEDs that go from green to yellow or red. The small display. A webpage dashboard. Or you can plug the data into HA for whatever you want.
The only issue I have with the display is that it’s monochrome and that prevents making data easy to read the trends, by showing positive changes as green or negative ones as red.
If the display is too small the LEDs are easily visible for quick information and then the dashboard is for more data.
Reviewers often have their issues really understanding how people use products, often because rapidly changing things to review, doesn’t allow them the time to truly use and understand a product.