I'm a fan of ecchi. I enjoy fan service. That being said, I'm not sure how this anime is scoring a rank higher than 5 or 6 (which is what most ecchi anime score). There is really not that much to be enjoyed here besides the incestuous obsession with his little sister, some ripping on Stephanie (the comic relief character), and lots of bright colors.
The two main characters always win, there is never a struggle. Honestly, it's very lacking in the ecchi department for an ecchi series, and it's very lacking in character development, more realistic story base, and struggle for anything but an ecchi series. I think whereas it tried to succeed in both, it ends up failing both.
To sum it up, I can't imagine anyone who is not an ecchi lover or a siscon find any real interest here. This is a pretty average ecchi anime, with maybe a bit more money being put into colors and animation.