A lot of people have Kill Team and are getting the box sets early to take a look at. Here however is a little different focus taking a look at the Astra Militarum, Tyranids, Tau and some Necrons.
Kill Team Reviews
There are also lots of reviews of the game online.
War of Sigmar Reviews
Kill Team Review of the rules (part 1 - Mechanisms)
Kill Team Review of the rules (part 2 - game)