I avoid it like the plague. Drones of people waiting in lines in bad weather just to get a tv at a good price? Is it really worth saving $75, even if you ARE one of the select few who will actually see those advertised deals? It's a psychological dance they play every year at your expense. 250 people in line for 10 units per store. THAT'S funny to me. They know once you find out the deals are already gone you'll rationalize to yourself that you didn't wait 15 hours to go home empty handed so you'll settle (reluctantly) to purchase what they do have in stock so you don't go home to the Mrs. and admit a defeat.
3 hours online and I'm done. Sure you'll pay shipping but it's worth avoiding all the aggravation you'll endure.
I work at Fred Meyer which is a division of Kroger. I do freight for apparel. We do a 6-hour sock sale every black Friday and my store is the highest volume store out of 130-some-odd stores. We do about $300,000 that day in socks!!! It took us 3 weeks to get our product and get ready and 2 10pm-630am shifts to set up. It was freaking ridiculous.