Do you know of a site or organization that rates travel packages?

I’m still trying to plan my trip to Costa Rica for this winter and it almost seems like there are too many choices. I don’t have the money to go “top of the line” but I also don’t want to get stuck on a cattle-car tour (gobs of people being herded around in a crowd). All of their testimonials are glowing – but then, they would hardly post negative comments. Is there a site that rates packages?