I am making an afghan with RHWL and I love it.
I have always been torn between using the original RH yarn and other brands like Simply Soft. I like the stiffness of the original RH. It seems to hold its shape better, especially when making squares, but it is not soft at all. And when I made my last project using RH, the lighter colored yarn was thicker than the darker colors, so the size of my squares wasn't consistent. I also came across several knots in the skein. On the other hand, Simply Soft is so much softer, but so limp and separates easily. So recently I decided to try the RHWL.