I have been using Mail Forward since version 1. I have been using it for over 3 years now and it is worth every cent of it's $19.95 price.
I can forward mail from all of my web accounts to one email account that I check on my desktop application of choice (in this case I am using Apple's Mail application). Mail Forward has worked flawlessly for over 3 years now. A few times the web accounts had updates or changes that caused Mail Forward not to work, but there has always been a fast patch of some kind.
And I cannot say enough about their customer support. They supported their softare with multiple correspondence between myself and their support team...even on a weekend! You can't lose by trying Mail Forward.