Na, F**k it off.
Don't want the game slowing down like that NFL does, where they review every bloody play, almost.
I don't watch NFL, but I do know their sport takes much longer than ours. Obviously doesn't stop you watching it, or make it less popular. If you can stomach watching cricket games last 5 solid days that end up as a draw, you can allow a football referee take a couple of minutes more as necessary, to get a major decision right.
I'm obviously 100% in favour as it's long overdue. I want to walk out of a stadium, (or finish watching a game) knowing that justice was done, it's not important how long it takes to get the correct decision as long as we get it.
Communication issues need to be improved, but it's here, it's happening, it's correcting wrong decisions made, it's the future of the game at the highest level, and those who object to it are just going to have to get used to it. As in the other sports where it's used, there's no going back to human error officiating anymore.