I've heard of bugs as well. Most likely they're trying to iron those out before a wider release, hence the delay.
I'm not planning to get it until after the Steam release, even though I don't use Steam. It does add quite a few interesting units, though -- a placeable flood, armed troop trucks (like a Ural with a PK in the roof), and some neat weapons.
"It is necessary to develop a strategy that utilizes all the physical conditions and elements that are directly at hand. The best strategy relies upon an unlimited set of responses."
-- Ueshiba Morihei