For a very long time I was prejudiced against Red Heart yarn. I had it labeled as the domain of extremely poor people and grandmas. But recently I've been buying scads of it and I've had to change my tune, especially since I found out that if you wash the item you make in warm water with castile soap (i.e. Dr. Bronners) or shampoo, the sizing that makes the yarn stiff and scratchy will wash off, and the item will get softer. I have tried this several times with moderate success.
I'm not a total RedHeartophile- there is only so much my fingers can take- but I'm enjoying their color selection now that I am in the boonies and am too poor to buy from a LYS. Our Joann's is small and has a poor selection of yarn, so I find myself turning to Red Heart more and more often. We'll see how long this lasts.
There's a long thread on Ravelry about this that I've been following, and it's interesting to see the opinions.