In the few instances of VAR use that I've seen, the final decision was correct (obvious, I guess) but the 5 minute delay was a real problem. It destroys the flow of the game. They have to find a way of making much quicker decisions.
I would rather have the flow interrupted and have a non goal disallowed due to an offside not seen or something else that can affect the outcome of the game. It's new right now so it will take longer for all to get used to it and they will get more efficient and quicker in the future. All referees want is to get it right and if VAR helps us do that then by all means a short delay is worth it, don't you think?