If used correctly, it can be a useful tool. That is using it to review and overturn absolute clear errors. Where you get into grey areas, is when you start to see it used to determine whether an infringement so slight (and did not impede play) that you have to to slow it down to frame by frame to see if it even occurred.

We've seen it in Australian Rules with goal reviews, where they will go down to a frame by frame shot (often with grainy footage that looks like it's zoomed in from 4 miles away and taken with a potato) to try to guess whether a ball has brushed the fingers of an opposition player as it was kicked. Farcial.

We see it with cricket and the DRS where decisions are made on a computerised estimate of the path of the ball, and match defining outcomes can be based on a millimeter or two.

Keep it for finding the absolute howlers, and it should be OK.