45 Minuten - 1 Stunde
Got the red ring of death on a used Xbox 360 I bought the kids for Christmas. I've ordered from iFixit before and so I was very confident in their products.
It went well. Everything worked as explained in the guide. The only challenge was cleaning off the old thermal paste from the chips and heat sink. Not easy at all. I used nail polish remover as I didn't have anything stronger.
Be prepared to get dirty, but it's worth it. Not as difficult as it sounds, just keep track of those screws and you'll be good.