Hacking is the main issue in web and mobile applications. Please be aware of sharing your id details with anyone.
Gmail is seems to be safe but it is not. 10 october is the date on which my id got hacked and some important documents and audios were deleted and till now I am unable to know who was the person who did it. There should be some option or application for users to share there queries and the time for resolving the issue should not be more than 1 week.
Apart from this, other features are cool but security is the main concern as all our social accounts are linked with the gmail account.