So I previously had a 980 before upgrading to the s9. The rollers on the 980 were fantastic and lasted FOREVER before I needed to replace them. I bought my s9 in May and I'm already on my 3rd set of rollers because they keep getting chewed up and torn up. The s9 has been a wonderful addition to my busy life, but I wish the parts were a bit more rugged like they used to be.