While I think the show overall is pretty lame the last volume has some good lasts eps. The Berserk Fury is just a great design. The battle with it and the Liger Zero is great.
The story is still pretty dull(a little better though), but the last battle has such a great mecha battle I have to reccomend those episodes.
Zoids Zero is pretty much like Star Wars: Attack of the Clones, the story sucks but the end is so fun to watch.
If you want a really good anime and don't care for brainless mecha battles go get the other Zoids called Chaotic Century.