For one thing, the plot was pretty plausible. A bit too subtle with the pervert touch part, but then again you might consider it normal if you count the Sonic XXX and the first Saturday Night Fun comic with Sally and Amy. Also expectable, since it's only a half extension like they did with Tails in Sonic XXX 2.5. And I may be either nitpicking or valorizing too much the plot for something I'll forget the moment I get to the sex scenes.
Then the sex scenes. For one thing, they were kinda short and subtle, especially the transition between page 02 and 03 (numbers 03 and 04 here). On the other hand, the well chosen variety of positions for the characters almost make up for it, and it works somewhat like the last pages of Sonic XXX 2. But then another thing strikes, which is the lazy lineart at a few points, especially on Amy. Fortunately, it gets better as the comic progresses, and most of you may consider I might be nitpicking, especially since the lineart errors only occur in the first few pages.
Overall, very little errors, a nice Sonic comic and very recommendable for those who are into Sonic or Amy, especially Amy. Only those who nitpick and have a real hawkeye would dislike this comic entirely.