Gmail is one the best email service I have been using since 2008. Before Gmail, I had used Yahoo Mail.
Currently, I am using most of the email service for different purposes with different mail IDs like, Gmail, Yahoo, Microsoft Outlook, and RediffMail.
Why Gmail the best in my view? Gmail is connected with Google account and which in return connected with entire Google Products, hence this makes easier to use all product and services offered with one Gmail ID associated with account.
Gmail Setups and Downloads: