It is a bit more tactical then
40K IMHO. Somewhere between Fantasy and
40K is the best place to put it.
The game relies on good combos for taking out the other caster (
HQ if you will).
It is also a bit smaller modelwise then
40k or fantasy, but still has lots of different units and combo's to use. (counting hordes there are 9 big factions and a minion faction for Hordes (no warlocks, so they can't play by themselves...)
Best way to get an idea of what I mean is relly get a testgame in (or a few) and see for yourself... For me it was the fact that I can pick up and throw giant robots around the arena, or into giant rocks
Best of all is the catchphrase:
Play like you've got a pair!!
loosely translated: Being a coward is less rewarding then head on go for the kill playing...