When I was a new knitter I bought a skein of Red Heart Super Saver because it was cheap. I did learn on it, but I didn't like it. It's kind of rough on the hands and while it does soften up 'some' in the wash it never gets super soft. Personally, I would never use it for anything again. There are just too many nice ones that are almost as good a price so why buy scratchy?
Red Heart DOES make some nice yarns now though that are soooo soft! I would go for those!