To give some background apart from what's listed above, Love Live is adapted from a project by Dengeki G's magazine in which they created a 2D idol franchise, often asking for fan input on group names and the like. Before the anime was released, there were many CG music videos for the main group (μ's, pronounced Muse).
So, yes, there is liberal usage of CG in this show. For the most part, episodes are animated traditionally, but in both the opening animation and any in-show performances, CG is mixed in for dance performances. If you've seen Aikatsu, it's quite a bit like that. It is, admittedly, pretty terrible; but if that's not a deal-breaker, then I would certainly recommend you give the show a try.
You might be wondering why I described the series as being close to my heart, when the story is generic and sometimes has overwrought drama. Now, the art is cute and well-designed, and the music is, at least in my opinion, some of the better idol-styled music I know, but neither of those is what made me stay with the series.
It was the characters.
At first glance, these characters are simply anime girl archetypes, and I won't deny that they're that too. But they're also so much more. Although there are nine of them and only thirteen episodes to fit them into, throughout the series, we get to know them to the point where, honestly, I felt as if they were my friends. While many shows have little but tired tropes in the way of characterization, the girls of Love Live are humanized, with various facets of their personalities explored and little details and quirks to flesh them out.
My only complaint is that I was so attached to these girls by the end that I wanted to see more of them; but in that case there's a near-endless supply of side material to sate my appetite for μ's.
In conclusion, it will probably be more enjoyable if you like idols already, but the characters are worth watching the show for on their own.
