I understand the circumstances of its creation (a very low-budget flick), but the Gigan suit does look kind of cheap. Of course, Megalon gave much more of the cheap vibe, but Gigan still does to a certain extent.
Also, while I do like Gigan's design (that visor makes him look super-evil in some shots, and he IS my avy), the FW design was one of the times where the update was just plain superior (design-wise) to the oringinal(ala Grand King Ghidorah to Showa Ghidorah). It just looks more cyborg-y, more dangerous, more evil and overall looked better. I thought it was pretty much the majority opinion that FW has the superior design, so it shouldn;t come as much of a surprise.
If its any consolation, I prefer Showa Gigan to his FW counterpart as a whole. He has a personality, actually was a threat and was overall just alot more badass. Gigan's overall one of my favourites from the Showa era.