So, I had my VIP722 installed about two weeks ago. For the first four or five days, it worked great. I heard some hard drive noise, but nothing that was any more disruptive than what I used to get with my DirecTIVO boxes. I would say that I didn't even notice the box's operating noise. One evening, after running quietly all day, the unit started to make a loud and unpleasent humming noise. It was loud enough that I can hear it over the TV at times, and it would certainly have been very problematic if I was attempting to sleep in the same room as the VIP722. I should note, by the way, that this was not the same loud fan noise you get when the unit first boots. To me, it sounded like a dying hard drive. I called DISH, and they sent out another unit a few days later. I installed it yesterday morning, and then got the exact same pattern. It was quite for a few hours, and by late last night I started to get a loud humming noise. I should note, btw, that the unit is very well-ventilated open area where my DirecTIVO ran for years with no overheating problems. There could be three explanations for this situation (the first of which I find most likely): 1) The VIP722 is simply a very loud DVR, and I'm just going to have to live with it. Maybe it wasn't really that quiet the first few days I had it - I just didn't notice the problem for some reason, 2) I received two defective VIP722s in a row, 3) there is something in the way that my system is set up that is causing problems. I did call DISH again today, and they are sending out a tech on Friday. (P.S. I know I've been coming by here with a lot of basic questions and comments since I had DISH installed and want to thank everybody for being so helpful).