I’ve been shooting with the Rokinon 35mm Cine prime for a few weeks now. I have it on a 5D mkIII and it works great for the hand-held walking around stuff I shoot. Low light inside is easy with the fast T1.5. I love the look shooting near wide open. The field of view on the full frame is nice and wide, but not too wide. I also have the 85mm Cine but have used it less. That one I pull out for sit down interviews for a portrait style look.
Here’s was Mathew Duclos has to say about the quality of the Rokinon lenses. link