I second this. I was recently burned when I realized my Google Apps email accounts weren't forwarding all emails to my primary email account. Apparently you can't disable the spam filter on your Google Apps email accounts, which means that if an email is sent to your Google Apps email account and gets flagged as spam, you'll never see it unless you log into the account itself. I was hoping to just have a more professional email address for my business that would just pass everything through to my primary email address, but alas that still isn't doable from what I can tell. :(
When you make a filter, you can mark it 'never mark these as spam'. I made a filter for mail coming into that email address and selected that. It works fine.
I think he meant that the google apps address is more professional and forwarding everything to his private @gmail.com address (probably configured to allow this apps address as a sender address)
