I am using this application since long time. The application is based on the emails threading. I can send and receive the email over the gmail. Its good to use. I can send the emails from anywhere. I can attached the file from the google drive or from android phone. Its layout is very simple.
Just I have to select left side button and it shows all the email folders and there is pen symbol to create new emails. Its user friendly. Its designed is simple. It has email search option on top of the right side of the application. Thats is awesome.