I bought this in the store, so I actually had the chance to flip through it before purchasing it. I knew ahead of time that the inside art would not match the cover, but in my experience with most manga/manga-like comic - this is the case. Thus, the topic is irrelevant in my review.
I gave it two stars because I purely enjoyed the little sequel, I love Labyrinth, and my desire to own this is purely out of nostalgia. The content isn't bad, but it is not written for an adult. So don't think you're getting something that is maturely written. It's slightly two-dimensional in its plot structure, character development and so forth.
But I want to buy the rest of the series. I didn't feel right giving it a two, but admitting to that. 3 stars. I wouldn't say to avoid reading this. If you're a diehard fan of Labyrinth, chances are you will enjoy having this as a collector's item if nothing else.