I fully expect that critics will praise the game... but somehow I don't expect large sales number. Reviews will come on release day, this gamersbliss article covers only 2 hour demo.
Gaffers who got the game report that the game is indeed as Machine Games described it "an action adventure game". It's not 100% manic shooter all the time, there are stealth sections and chapters where open combat is minimized. There are several "wacky" weapons that allow different manupulation of nazi's and objects.