Truthfully, I don't care about the scale issue, or even if its canon.
even if I wasn't a Macross fan, I would buy this toy, for the sheer coolness of it. I mean, its a giant transforming mobile artillery piece! how cool is that!
I am a fan of transforming mecha, and most Gundam models don't do it for me, because of the simplicity of the designs (RX-78? ick) I like a complicated transformation sequence, and although the YF-19 was almost too much, I loved it most.