I updated firmware (1.9). Just one lens work correctly with this product, EF 50/1,4. My other lens not focused EF 100/2,8, EF 35/2, EF 28-200/3,5-5,6 (CDAF/PDAF).
It does work with the FS700 and the Canon 24-70 II 2.8 but the focus does hunt back and forth for a while and keep hunting for a long while before settling in a focus point. I'm not sure this is usable in case of gimbal or handheld. It is definitely not as good as a Sony lens but I will test it in a real life situation and give additional feedback in the future.