Shooting this week in Korea with Sigma’s new-ish high speed cine zooms (18-35 T2 and 50-100 T2). The image is certainly very sharp on both lenses, finding focus feels easy. The 18-35 is particularly useful, and even without a follow focus I'm a fan of the 180 degree focus rotation. I might feel different if I had to do some huge pulls but so far so good. However, moving from 50 to100 or from 18 to 35 is a fairly slow procedure. Hard to say this is the best setup for solo shooters, if you’re not in controlled environments.
But overall they are pretty useful lenses. Id want them in my bag.