Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't even think about it!

If the option had existed to rate this product with zero stars, I would have! I have been interested in space exploration since I was a child and am delighted by the mission report series collated by Robert Godwin. This CD rom, however, is the worst piece of merchandise I have ever encountered in this field! Quite why someone would charge [so much], let alone pay that much for it escapes me! World Spaceflight News should hang it's head in shame at issuing such a complacent product containing almost exclusively public domain material. If they had any concience they would refund every penny spent on it by trusting souls like myself! I don't mind paying for quality, but I do mind paying for complacent products like this- I cannot afford it!