Well, I didn't get to technically FINISH ZaAt, but I thought I would still make mention of something...
Wow. Just wow. This movie does not deserve to look this nice. If all you've seen of it is the crap print used on MST3K, all you get is this red-tinged, drab looking film made in a guy's basement. The restored Blu-ray? It is almost night and day difference when it comes to brightness and color. The monster is incredibly fake-looking, but bright green with little red speckles, and even though it's filmed in a basement, that basement is filled with so many different colored light bulbs that it just looks sort of pleasant to look at. The outdoors are incredibly contrasting as well, with deep green grass and blue water. It does make the stock footage scenes stand out a bit more, since they're not cleaned up as nicely, but in all honesty, the movie's script and acting may suck, but there's a lot more that had been visually lost to time in low quality prints that gets represented really nicely here.
In summary, it's still stupid, but it looks really nice. However, if you like film grain, be warned...this thing has gotten the full noise reduction treatment, so up close you can see a sort of smeary, waxy look to everything, but very little in terms of print damage and other little issues.