I would buy one based on my experience to date. That might change once I see how they deal with the seat issue. I have a 5.0.
I read through all the posts above. Hammering the Germans (justified in my view), and Lexus (justified).
My Genny is the first non domestic for me since 1989 (300E). I know I may get knocked here... I have owned Ford L/M cars and trucks much of my life and exclusive since 89 (except for a SLP Firehawk). If looking for sedan, I would check out the SHO, or MKS (with AWD and twin turbo like the SHO). I also would look at the V6 MKZ. They are way underestimated (like the Genny). And I have had great reliability with FMC products. I buy them for my guys at my company, and personal. I have enough volume to have a decent idea of quality as it relates to failures and defects. Many of my FMC cars and trucks have never seen a dealer for warranty or after warranty repair. Solid, nice features and easy to operate. The early Sync systems are better than the Genny current DIS product from a reliability (based on forums here) and ease of use (IMO).
I am also impressed with Government Motors Caddy ATS V6, CTS. I have friends who like them. Although there trips to the dealers while lower than reported here in this forum, are more than I would like.
I also have business associates who love their Chrysler 300. Either V6, V8, or SRT. No dealer visits, and good quality and ease of use. And good mileage if driven normally.
There are good deals out there for the domestics (not much on the ATS, it is selling more then supply from what I hear). The quality is better than any European and most oriental, on many of the domestic models, especially the sedans I mentioned.
I have Crown Vic's who have had business mileage over 250, and going strong with NO major repair and no defects. Same for various work F250-350SD. Yes, even the diesel. My personal favorites are the 2008 F350SD and 2008 Fusion Sport with a manual tranny. Yes, a rare manual (and used by me. And for the kiddos to learn a stick).
I have owned a gaggle of Mustang V8s over the years. All reliable, never dealer queens.
Please check out domestics. There are many good ones today, if you decide to look past a Genny. They have good paint, do not rust, fun, good mileage, low defects and repair (I have recorded and experienced in my business and personal fleet). Certainly you would not be full of vanity if interested in a Genny instead of the over inflated Germans. So, take the time to compare domestics. Time to lose any potential domestic auto racism.
For the moment, the Genny I have is one of the best cars I have ever owned. Based on how it fits me, how solid it feels, value, and overall performance.