If you're looking for something else to read, i would check out a manga called I Am A Hero. The art is a little......ugly, but good in its own respect. The story though is pretty nice and character development is done really well. It starts picking up after chapter 9, though the action really starts at chapter 11.
So I finally read TG. It was a pretty fun ride, and aside from the extremely (as of now) disappointing ending, I'd say it was pretty good; but that's the problem, the ending of a manga is supposed to be the ending. Seeing as this is the end of part one