The problem with Cohiba is the brand name factor. It is Cuba's flagship brand, they are good, but I feel overpriced. Don't get me wrong, I keep a few in my humidor and enjoy them on rare occasion.
As for Cuban cigars being the best in the world, maybe at one time. Today with amazing quality coming out of Nicaragua with Padron cigars, and the Dominican Republic with Fuente, add the fact that Cuban soil has been over-stressed for a couple decades with huge demand, and quality control sucks, I will take a Padron or most Fuente over a Cuban any day.