This is a great series, from first frame to final credits.
I admit that I was completely taken into the glossy, glamorous, ultimately shallow world of the US legal system as depicted here - and I thoroughly enjoyed every moment.
While I fully accept the comment that the show sometimes felt like an ongoing marketing campaign, on a perverse level, I actually felt that element added to its enjoyment. Moreover, neither the show nor the actors involved, ever appeared to take any of it too seriously.
As for the Rainbow comparisons, I actually thought Rose Byrne was pretty good as the clever but extremely naive, rather pompous young lawyer, who makes the mistake of believing in her abilities just a little too much. And Glen Close makes a hugely enjoyable 'villain'.
To any potential viewer, don't over-analyse, just sit back and enjoy!
I've given it 5 stars because it was so entertaining, and on watching the series a second time, I loved it even more. Good television is a rare commodity in this reality/celebrity TV obsessed age, and I salute any series steers away from this sorry state of affairs.