I’ve had acrylic yarn squeak when knitting with bamboo needles! YUK! I have noticed in recent years that the quality of Red Heart super saver yarn has gone down quite a bit, and I’ve discovered other acrylics that I like better anyway. Vanna’s yarns are nice and soft and still have some substance to them, and I do like the Red Heart Soft yarns too. I find Simply Soft much too soft and slippery and it seems to have no substance at all and I don’t like how loose the plies are.
I love to hear what different people have to say about these kinds of things. Everyone’s experience is different and interesting.