I am using Grammarly.com for my office work for email writing so what I found it is good it helps me a lot but sometimes it is very frustrating and disappointing because of some technical glitches like when we talk about their Information Depth Grammarly offered little more than superficial Advice that is not useful for my Email Writing.
Content -The writing suggestion felt robotic and repetitive.
The constant Pop up, reminders, and notifications made me feel like an I was trapped in a never-ending Grammar Quiz.
Loading of Grammarly extensions or websites loads very slowly all the time which is frustrating. Service and support I had never used because it is a very lengthy process waste of time.
In terms of content, there is no good content that you will wright that only it will show you, and if you want to see their content you have to pay for their premium content.