The only advantage is to have one point for all email. I have seven accounts, some IMAP, some pop. I want a unified mailbox where all mail gets deposited, but I want gmail push to work as well as it works in the gmail client, hence the settiings.
The options I have are;
Email address: My Gmail email address
Password: My Gmail password
Domain/User Name: Here I put ASPMX.L.GOOGLE.COM
Exchange server: m.google.com
These settings don't work for me.