It took exactly 1 month from date of order to date of receipt. It took me 90 minutes to install, mostly because I didn't have a magnetic screwdriver and twice I lost screws into the chassis and had to back up a few steps to get at them. I was extreeeeeeemly careful with the locking tab on the fan connector because all of you careless uncoordinated meatfisted brutes who went before me said it breaks off easily. Yup, I broke it.

Luckily, it only hurts my pride, not the computer.
A few notes about the
QuickTime instructions and the printed instructions:
* It is worth going through the QuickTime videos a frame at a time before you start the surgery, to see how cables are routed. The photos in the printed instructions aren't quite as clear. And of course you can't use the computer to watch the video while you have it powered off on the operating table! If you really need to, you could have another computer in the room to display the videos, but it wasn't necessary.
* I found it helpful to write down which way the cables connected to the drives. For example, on my dual drives in the back bay, the upper drive uses the gray data cable and P2 power cable while the lower drive uses the black data cable and the P3 power cable.
* After you remove everything, you reverse the steps to put everything back together again, but they don't explicitly tell you to reconnect all the cables and reinstall all the screws. Do them when you come to them in reverse order of how you disassembled everything.
Boy is this computer quieter! Much to my surprise, I discovered that there were people, pets, telephones, doorbells, televisions, radios, and stereos in the house. I never heard any of them before. OK, maybe I'm exaggerating a bit, but it really did make a noticeable difference.