Instruct: Classify the given Amazon review as either positive or negative.
Query: Warning re Acrobat 5.0 Upgrade for Mac

If you purchase the Acrobat 5.0 upgrade for a Mac running OS 7.x or 8.x with Adobe Exchange previously installed, and your experience parallels mine, you'll waste 2 to 3 hours attempting without success to install it. If you then fight your way through Adobe's support system, you'll find that there's a "fix" on their web site -- In other words, Adobe will ship you a product *which they know at the time of shipping* to be totally non-functional, and despite having your contact information from the online order, give you no warning of this. (Incidentally, for your [money] they supply you with a CD *and no users manual*)