One thing seems fairly certain--whatever 1.1.5 was supposed to have fixed, it sure wasn't the Hulu app. It still starts stuttering after 20 minutes or so.
The other apps (Amazon, Crackle, Vudu) stream flawlessly, so it's a bit maddening that Hulu hiccups so frequently since I use that service more than any other. It probably won't bother most owners--and it's certainly not a dealbreaker by any means--but it'd be nice if I didn't have to fire up the PS3 for Hulu.
On a more positive note, I continue to be impressed every time I turn on the tv. The image quality is really superb, especially when being fed good source material. I'm probably not the most discerning viewer, but I don't think it gives up much to my previous Kuro. Blacks aren't as deep, but it's not a magnitude of difference and they're certainly inky enough on the Vizio for the viewing experience to be very satisfying.
It's so good, in fact, that a couple of friends are seriously considering getting one for themselves after seeing mine. I should probably get Vizio to send me a royalty check or two.