2 full days with it now, and the difference between power saving modes is significant: Highest setting, fans run like beasts. Automatic setting, fans ebb and flow (but mostly flow). Reduced setting, fans are hardly noticeable. I thought I might be able to throw something together in Automator, so I could hit a series of 3 buttons to switch power saving modes (depending on what I was working on). No such luck. I don't have time to learn how to make my own plug-ins for Automator, so I guess that's a dead end for me. I wonder if there's an existing plug-in for that, or if there's a widget floating around that makes it quicker to switch than going through Preferences? I'll have to google a little more.... Any one else switch modes to dampen fan noise?