What do you like best about the product?

When you have to write texts from a spoken source or translate from one language to another, mistakes are more likely to be made. Even if a person has learned the language by using it every day, this is not a guarantee that they will not make spelling mistakes. That's because memory gives the spelling as it is, without checking, especially if the person is not a native speaker of the language they are translating into.
The latter is the responsibility of Grammarly, as it sorts misspelled words and structures into categories and provides a summary of the number of errors in the text. Then, in the right pane, the user can correct them with one click. The advantage is that the service offers spelling options even if the initial one was wrong. So, the final text

What do you dislike about the product?

Functions came with AI, and get more in-depth understanding of texts, are still paid. So, if to use any others AI-tools, it needs to choose what is the main for the budget.

What problems is the product solving and how is that benefiting you?

Grammarly proofreads texts to improve spelling and correct mistakes. It is a thing required if the text is for a foreign audience.