Did you use heat? Also, did you use it just once? The first time I used AO HSR, I wasn't impressed, but the 2nd time was phenomenal. It left my hair very soft, like internally soft, not softness derived from a slick feeling product. I would try it again before I move on to another one if I were you.
Anyways, I find HSR more moisturizing than Island Naturals (I use IN, but when I need some light protein and moisture).
Also, AO cons don't have that much slip (though IN has a bit more slip than HSR), IMO.