The nude giantess villainess in the beginning was, in fact, verily, very hot. Even if she only lasted one chapter before getting eroguro'ed.
When I learned the series was rebooted, I sure hoped for a lot more of that, but instead the author decided to make the ultimate piss fetish mecha manga and only had a scene-by-scene rehash of the original giantess fight in the final chapters. How disappointing.