Is this Italian Sausage still good!?

Sorry I know this is a goofy question but I need another opinion before I cook this. It was frozen before Dec 18th 2008. And I had in the refrigerater for 4 days after it was defrosted, and I want to cook it tonight but I want to make sure it's good before I make us sick. I investigated it and I didn't see any mold or anything, and it wasn't getting brown and it smelled ok. what do you think?