The only feature of APM that I use is the option to turn off the monitor after a period of time (30 minutes) most likely is not good for the monitor but does help to cut A/C cost, as I have three machines running in the same room. This could be a good safety precaution as well, since I have heard of unattended monitors catching fire, though I don't think it is a common occurance. Much more likely for that overclocked pentium with the dirty fan to let the smoke out
