First off let me say that the last 2 reviews on CSC are from the SAME person and the other doesn't speak english well enough to have an understandable conversation. I was sitting right in front of the people who brought in the expired groupon. If they were smart enough to hit every website they could find about skydiving and write bad reviews I imagine they are smart enough to read an expiration date. I am a regular at CSC and enjoy my experience EVERY time. Go to the grocery store and try to use an expired coupon....see what they say. All in all don't be an idiot and don't expect people to give you special treatment due to an inability to follow guidelines. Want to jump out of a plane? There is no better place around. Just look at the reviews that don't include groupon in them and see what you get =) Blue skies.