So I got the lip palette and it's okay, I like it, and I would say it's worth the $20, but I don't love it and I don't think I'll be reaching for it very often.
I do like the range of colors and textures - - the more pigmented ones really give opaque coverage, which was a pleasant surprise - I tried one of the blues and it was a holy-crap blue (which I actually liked). I would never buy an actual tube of blue lipstick, so it's nice to have some oddball colors - - I think that is probably the best thing about it, that it contains colors I wouldn't actually buy a whole tube of, so I get to try a lot of colors for the price of just a couple of tubes of other lipsticks.
That said, as far as the every day sorts of colors, I found several of the pinks to be either too coral-y or too purple-y - - and I am a pink lipstick girl so I was surprised that of the 4-5 pinks I first swatched, none of them really stood out to me. Also the glosses (the first 5 colors in the top row) are really thin and do not give any color payoff - - I'll be lucky to get 3 uses from each of them - on the first use, I actually hit the pan - the texture of those is like a thin Vaseline . The lipsticks themselves have more heft though and are probably good for 10-20 uses each.
All in all, it's okay, but if I lost it or it got damaged, I wouldn't repurchase. In fact I'm not 100% sure I'll even keep it. I think CS should stick with eye shadows - - those are well worth every penny plus some.