I thought it was great, love it.
actually it is BRILLIANT
sorts out the rubbish from the important emails
It's sorting your emails into categories, quite useful really.
No it isn't. It's my job to sort my e-mails, not Google's. That's because I know what I'm doing, and Google does not. Not to mention the fact that I want my e-mails sorted AFTER I've looked at them, and not before. There are few things more annoying that software companies guessing what you want to do - because they get it wrong so often.