I have not smoked a wide selection of Cuban cigars (I have had a few). The ones I had were of high quality, but they packed a little more power than I was comfortable with. As a result, I usually stick to South and Central American Cigars.
Famous Smoke has a nice article that addresses a lot of issues that might pop up if the Cuban embargo is "thawed".
With a production model that only uses Cuban tobacco and limited real estate to grow said tobacco, this model of rolling Cuban puros is doomed to stretch resources extremely thin to the point where they will likely sacrifice quality across the board, including EMS cigars, to meet demand. Queen and country won’t be too happy about this, but lifting the embargo to create this mess is just another way America can be a thorn in the side of the English.