How good are these natural skin care products?

I am most curious about Burts Bees, Alba (the seaweed line, not the hawaiian line), Vitamin C, and zia. I would most likely just get the gel-based cleanser, but am also looking for a new moisturizer. I break out very easily, and I find that fragrences and sunscreens aggravate my acne.

How good are those lines of products? Are they worth the money I would spend?