My curiosity is now piqued for Canon's red-headed stepchild, based on this thread. Regarding the Ursa Mini, take a look at the ratings at B&H: http://www.bhphotovideo.com/c/product/1137314-REG/blackmagic_design_cinecamursam40k_ef_ursa_4k_digital_cinema.html
A whopping TWO stars from 23 reviews. Yikes!