To sum up the show, while it's not as good as the first five seasons, this was still entertaining. This season is easily better than six and seven (seven is, by far, the worst Supernatural has to offer) and is about on par with eight. Can't wait to get ten on DVD.
As for the discs, the show continues to have a decent set of extras. There are three commentaries. All three are fairly informative, and all are entertaining. The sixth disc features a nice set of featurettes on the Men of Letters and are pretty interesting. The 2014 San Diego Comic Con panel was a fun treat. The gag reel is much of the same in terms of gag reels. The best feature, however, is Behind the Scenes of Supernatural: A Fan's Perspective. Created by Misha Collins, it's incredibly funny and shows off the cast and crews good natured personalities and that they can poke fun at themselves. It's a real treat.
Great set overall!