For a free service, it is awesome. You can create a budget, and it will track your spending by using your bank and credit cards web access. It will automatically catorgorize your purchases, but you can easily go in and change them if it is wrong.
My bank wasn't included at first, but I let Mint know that they weren't available and in about 6 weeks I was able to add them.
Is it the best out there, probably not, but it is the best free service for sure.