Decent overall quality. Art is pretty good, story is decent, and dialogues aren't that bad. The fight scenes though... they are often way too long and get really tedious after a while. A single punch is nearly always several pages long, followed by more pages of some guy being blasted backwards. At times a single punch can even be an entire chapter. It get pretty tedious after a while. What makes it worse, is that the author tries to stretch fights out even beyond that. There is always some stupid reason for for the protagonist to not quickly finish off an enemy. So then that several pages long single punch, gets stretched into 10 punches. So that guy that could have been instantly beaten, now takes up several chapters.
If you like that shit. Read this. If not, you might want to think twice before reading this.
You also need to make sure you get the correct translation. Because there are at least 3 different versions from what I've seen(there are more versions beyond what is uploaded on this site). It goes from barely legible (maybe even worse than machine translation), to pretty decent.
[edit]
Okay. At some point the translation team changes and the quality goes down hill. Still acceptable, but not good. Then at chapter 90-ish 'Manhuaes' starts translating. And boy oh boy are they bad. Dropped after reading a few chapters from their 'translation' -- if you can even that abominable writing a 'translation'.