Well, I think the cheapo's probably contain much the same as the more expensive things and you're just conned into paying for the name, but on the other hand, there's something wonderfully decadent about spoiling yourself with something that's cost an arm and a leg. Funnily enough, my grandmother swears by Astral, and for someone in her 80's she has a wonderful skin, so there you are, but a lot of it's to do with genes. Without surgery, you'll never make a silk purse out of a sow's ear!