Does Grammarly actually works? Review Grammarly 2019

Straightforward test run of grammarly in a few minutes 

Issues encountered:
  1. Grammarly extension tool bar is unstable
  2. If you intend to use it for google documents, chances are you will be unable to.
  3. If you want to use it over an application downloaded on imac, it will not be able to. (Grammarly application does not run over other applications, you have to upload to the application itself which is similar to the web app -- I would recommend not downloading the application on imac itself for this reason itself)
  4. Grammarly supposedly runs on other web services -- it is unstable on mozilla firefox
  5. Only google chrome is compatible to be used for google docs.
  6. Proofreading is not provided in the premium services
What Grammarly can be used for per experience as shown in the video:
For USD 29 / 1 month, you get the following:
  1. Grammar check, word frequency, word and phrasing difficulty reccomendation. Word and grammar phrasing . 
  2. Plagiarism check
  3. email checking
  4. youtube checking
  5. other web pages if the extension work