I am not sure what to make of the errors in your piece. Are they intentional, illustrative of Grammarly’s repairs, or is this your best edit? I have been using it for awhile and yesterday, I decided to go it alone after going through a book I am working on as a final edit. I have concluded that you should keep an original to compare it and then read it at least once or twice slowly.

It does have a great conclusive feature, which tells you what mistakes you make habitually. Then you can look up those errors and become a better writer.

I highly recommend it for that.