I was actually doing a test drive of Adobe Acrobat DC (the 7 day free trial) because I need to purchase 15-20 licenses for our small business. I got the quote easy enough on line (isn't that always the way it is -- you can get them to sign you up, but then you can't get any customer service), but I had one issue with optimizing and was trying to find someone...ANYONE...to help. I called the support line and got someone not in the US who proceeded to tell me there was no issue. Really? Then why does my Adobe Acrobat Pro 9 take 60 seconds to optimize a document, and DC takes 8 minutes to optimize the same exact document? I tried calling back (for about 30 minutes) but got caught in 1-800 number automated selection hell and whenever I selected the option that I wanted....it would hang up on me. I can't say that I'm impressed and, at this point, I'm looking into Nuance PDF as an alternative.
EDIT [branched from an old discussion already marked as answered – moderator]