Hey, I've been using this product since about June of 08. I love it. I do think it's moisturizing to the point that I could probably detangle my hair just after rinsing the poo out without adding any con. I don't think it has much of lather, but I don't use that much (about a quarter size on each half of my head). If you use it in conjunction with the conditioner, your scalp will have a nice refreshing tingle afterwards.
Though I'm not natural, I think it does pretty good job in cleaning my scalp, but not stripping my new growth of moisture. And to answer your last question, I'd stalk TJ Maxx or Marshall's if I were you for this product. Once, I got a bottle of the poo for 10 bucks at Loehmann's (the small size), and the 2nd one I bought, was like 3.99 at Marshall's. TJ Maxx sells the liter size (in the new packaging and all, so it's newer product) for about 15 bucks. Online, the liter is like 25. HTH!