First of all, thank you! This is a great write-up.
I figured I would go ahead an share my experience.
I have had to do this twice so far. The first time was at about the 100,000 mile mark and the second at the 112,000 mile mark. After thinking about it, I think only the seals went bad on the first housing as there wasn't any oil on the housing itself, only in the valley. The second one appears the have leaked around the cooler itself and may have started leaking coolant at the seals because one of the seals was very corroded and gritty. The second housing was purchased on Amazon and has a lifetime warranty which sounds good until you spend your lifetime changing housings. They sent a replacement before I even torn it apart so I guess that is good. This time I also ordered the Fel-Pro gaskets (ES73012) hoping the SI blend would be better than the rubber ones that come with the Amazon housing. Well I went to put these seals in and the one closest to the extended port seemed to be carved deeper because the Fel-Pro seal barely protruded above the plastic. Needless to say I installed it with the same crap rubber seals again. I have a bad feeling I will be doing this for a third time however, if so I'll just fork up the money and get one from the dealer, ugh. During the install I discovered my driver's side valve cover started leaking around cylinder 4's sparkplug hole, oh joy. I might get to this in the future however, after watching videos of the passenger side valve cover gasket replacement....if it starts leaking I'll have to sell it because that looks terrible and I'll break something for sure.
If you don't have a 90 degree pick, get one. The red locks on fuel injector plugs are the worst. The first install went okay with a small flat screwdriver however, the second one did not. Maybe I was tired or irritated but I broke two of the locks. I almost didn't get the last one off, luckily my wife was patient enough and saved the day. When I put it back together I didn't lock them so hopefully that wasn't a mistake.
Overall the job is worth the savings spent at a dealer, assuming you don't destroy any connectors. It just takes time & patience. The people that say it’s a couple hour job, good on your part. It took me 4-6 hours each time. Maybe I take too much time cleaning the area, I don't know.
Anyway thanks again for the write-up and good luck to all that perform the job.