I dislike UDRS not because of the less reliability, but the fact that it is used more like a strategic weapon than an incorrect decision changer. If there is a wrong decision, you should have not to be having to use some of sort calculation and strategic planning to appeal against. Also close decisions result in number of challenges available to be removed, which is unfair as they were that close hence team was justified in appealing the decision & punishing them for that is ridiculous.UDRS gets a thumbs down for me for not what it is intended to do, but for how it is implemented.