Real quick first thoughts, as I've not had much time with it, nor much time to integrate it well. I really haven't spent any time dialing in phase or looking at the frequency response on my RTA.
Remember I've got Polk Monitor 70 fronts, and a Yamaha Adventage receiver.
Music: This sub has changed my opinion about subs and music. It is very, very tight. I've listened to high end Velodyne (I know, old school), and others and could never figure out why you wouldn't just listen stereo... seriously. I've also listened to an Emotiva Ultrasub 12 and liked it, but only at lower volumes. This thing hits hard, and fills out what the 70s were missing. I am a bass player and like a little more in my EQ than is probably normal. This sub gives it to me without it sounding directional....usually I'm looking in the corner of the room and pointing....there's the sub. Right now, with the little tweaking I've done, it blends perfectly. Listening to modern jazz like Chris Potter, Bela Fleck...tight, focused bass, especially in the kick and toms. Nothing resonates. Gospel music that is heavily bass and drums fills out nicely, even at low listening volumes. Rock, like U2, Foo Fighters, Pink Floyd has a nice deep bass sound without over powering...it sounds lame to say "clean", but it's a really good descriptor. I still really need to work on the EQ on the mains to match this new beast, but I'm really happy thus far.
HT: Watched one movie and a couple of clips from others, and there's a huge difference...LFE effect I can physically feel...but they aren't overpowering or fatiguing. ex. when I hooked it up, I never thought my wife would like this thing...anytime loud bass come on in a movie, she says turn it down, it bothers my ears. She wanted to watch her Lion King Blu-Ray, and in the first scene that has LFE effects (Elephant Graveyard), this thing rumbles the house, and my wife looks at me and says "woah, that was cool." She actually likes it...it was worth the price for that.
Like I said, I've really got to tweak phase, dampening and extension setting to dial in...but initially this thing is great.
Also, it's huge and heavy, which I also like....very man-ish. More to come.