I enjoy a good smoke, too (did some of you already figure that out? Lol.). I've been smoking them for the past 15 years, and have a lot of Cuban experience. There are some amazing copies out there right now. There have already been several ways to spot them listed, but to get a little more detailed...
1. All Cuban boxes will have a factory code stamped on the bottom.
2. All Cuban boxes will have a hologram sticker on top that reads "Habanos".
3. All Cuban boxes will have a sticker that is a "certificate of origin" wrapped around the opening end of the box (it actually has to be put on a very specific way).
4. The easiest way to spot a fake single stick is the cap. The trademark for Cuban cigars is a triple cap. Also, the filler will be folded in an accordian shape (you can view this from the foot, or open end). Most counterfeits will not take the time to construct this way.
Two wrongs don't make a right, but three rights make a left.