I liked To LOVE-Ru because it neither failed nor exceeded my expectations. I took it for what it was, a comedic ecchi harem, and nothing more. And I wasn't disappointed in the ending, like I was with Ichigo 100%.

Story: 4
The story was more of a distraction (and at best a complementary element) to the overall read. It got pretty crazy and beyond explanation most of the time, but it wasn't anything I got upset over. However, if you want a manga with a good plot, you might wanna skip this one.
Art: 9
The art style made this manga for me. The extremely well-drawn characters scenes they were put into fit very nicely into this genre. The ecchi drawings also fit in nicely too, not crossing that invisible line but providing quite a bit of fanservice.
Character: 7
Character development wasn't amazing, but it held its own. Although I thought the development between Haruna and Riko was entertaining (one of my favorites to date), some of the supporting characters were a bit lacking in quality. Overall though, it didn't ruin the mood of the manga for me.
Enjoyment: 8
As I said before, I took this manga for what it was. I came into this with low expectations and came out lightly surprised. This is an ecchi harem, don't expect too much.
Overall: 8
I can confidently say that this manga isn't as bad as you might think from a first glance. The story is ridiculous and absurd, the art is fantastic, and everything else is exactly what you'd expect from a harem.

If your still not sure about giving this a go, I would recommend that you just dive in. I had been avoiding reading this one for a while because of some reviews that I read. But I think if you go into this with low expectations, it can be quite enjoyable. I'll end with this metaphor... Don't expect a knock-out homerun, but this standup double will do just fine.