I love the GMD prefolds. I've had several sizes, including the brown edge, and they're soft and durable. I've bleached mine several times (I'm lazy,and that's the fastest way to de-stain them) and they're still fine.
I have one Growing Green's OS dipe. It fits DD fantastically--it's really thin on the sides, the elastic is nice, and the snaps are in good places. Unfortunately, it's also very hard and not absorbant at all. The amount of dipe between her legs is very skimpy and not fluffy the way the MO Sandy's are at all. I've never bleached it, so I can't blame that. It's a shame, since it fits so well, but I wouldn't buy any more of them. (FWIW, I like the MEOS just as much as I liked the MESandy's, maybe more.)