ATEM Television Studio

Has any one used this in a live show to screens
if so how did it work ?
Was there any delay ?

Used it in several shows where we project to the big screen (IMAG). There is a delay (specs say so - of at least 1 frame in our case)... but not so as anyone (including me) really noticed. We did not have genlock on the cameras either (just two Sony EX3's). With genlock other posts here say you can achieve 1 line of delay.