Doesn't seem to be working too well so far does it?

Three pen shouts last night, one questionable (theirs) two nailed on (ours), I can sort of forgive the ref for having his eyes elsewhere but what about those watching from the VAR room?

Maybe video review isn't the right thing for football, it works brilliantly in cricket, appears to have taken all the brattish behaviour out of tennis (ok some), is just accepted as part of the sport in NFL and video replay usually produces understandable decisions in F1, but all sports are different. The nature of cricket tennis and NFL are stop-start anyway so delay of play fits in OK there, and in F1 penalties can be applied retrospectively.

Its here to stay, but note that the other big ball game above, NFL, took three decades to get it 'right'