Hawkeye has worked really well since it came in. I'm quite happy to keep it. It's one error and whatever the circumstances I think it's made a big difference - it also isn't a judgement decision.
VAR however can go for me.
They are still very much judgement decisions. When you see them toggling for an offside with the lines drawn across the pitch and come up with an offside decision based on 1/2" you know it's madness because with such small margins of time they can't possibly align that with when the ball was played.
Then we have all the inconsistency over penalties that are sometimes given for a minor shirt tug and then not for such a tug it tears the shirt.