I bought one of these half a year ago for $420 from Woot.
From what I remember from my research, some of the Vizio E-series have IPS, some have VA. Mine has VA, and thus, has a pretty narrow viewing angle. At more than about 20 degrees off of center, everything grays out and loses vibrancy.
The E-series gets a very strong recommendation as a gaming TV from Rtings due to extremely low input lag. (~30 ms)
I can attest that the Smart TV features for the TV are limited but functional. It doesn’t come with a web browser, but the apps work fine.
I bought this TV a few weeks ago from Woot. Had a huge crack in the corner and I had to return it.