First Impressions
I thought my writing was good. Grammarly showed me it was 'Passive' and 'Unclear'. The tone detector saved me from sending an angry email to a client by suggesting I sound more 'Diplomatic'.
Best Feature: Tone Detector
Knowing how your message will land before you send it is invaluable. It catches subtle aggressions or confusing phrasing that spell-checkers miss.
The Verdict
A professional necessity. It runs quietly in the background and makes you look 10% smarter.