I think it looks great, but to be honest I don't see the point of buying from Cartier for a necklace like this.
I get that there's the Cartier "C", but other than that it looks like the necklace could have come from any jewelry store.
As I'm sure you know Cartier charges a ton just for the name and they'd charge out the nose for a .55 carat diamond necklace (thousands and thousands more than non-name brand).
For designs like Love and Juste un Clou (and necklaces from those collections) it makes sense of course because the design is Cartier's and they're not going to let anyone use that.
When it comes to an item like this where the trademarked components of the design are much more subtle I don't really see the point of paying thousands more to get it from Cartier unless money is no object at all. You could get a necklace not from Cartier with a significantly larger diamond for the same price.
Take it or leave it but that's just my two cents.
I love Cartier, but I get your point; there are some designs that I won't buy and prefer to admire from a distance because you can get much better value elsewhere. Then again, when it comes to luxury brands, value goes out of the window
