It is an ecchi harem anime with monster girls in it. The show also features plenty of nudity (but, hey, it is an ecchi harem). Overall, my impression of the show was fairly positive, although there are weak aspects in this anime.
This anime has surprisingly good music. Opening and Ending songs are catchy, and ending song is something I would listen to.
Characters have nice design, and were obviously created with care. The surprising part was "monster info card" which appeared at the end of every episode and detailed several different monster girl types.... except that many of those monster girls never even appear in the anime. This gave me impression of the world having some sort of a well thought out lore behind it.
The weakest part of the show is its story - it is nothing speical. While male lead is thankfully not spineless and the story doesn't happen in a school (that was fairly surprising), there are many cliched interactions, and characters occasionally act in somewhat less-believable fashion. The story gets better when it starts nearing the last episode.
Characters do not really develop much over time, but since the point of story is comedy and because there are a LOT of distinct characters, that is not a very big issue. Сharacters, thankfully are not incredibly cliched and do not squarely fit into some anime archetype (like it happened, for example, in seirei tsukai no blade dance), which is a good thing.
Speaking of which, animation and visuals are quite good. I haven't many noticed obvious standard budget cutting tricks that are common in lower budget titles, scenes are usually well animated and have nice background. So the show is fairly pleasing to eyes as well... though I wouldn't call it "gorgeous". Good, but probably not great.
Overall, I would say the show loses points in its story aspect to titles like To Love Ru or Sora no Otoshimono, and is less "ecchi" than To Love Ru, although it isn't shy about nudity (there's a lot of it). Although the story is fairly weak, due its interesting character designs, and nice music, the anime is still enjoyable.
With all this in mind, if you're interesting in ecchi/harem comedies, the title is definitely worth watching. Despite its fairly weak story, it is fairly well done, and while it wouldn't surpass To Love Ru Darkness, it is better than many significantly weaker titles in the genre (for example, Magikano, which I dropped, comes to mind).