It's not quite a controversial topic, but as conversion rates are becoming more and more of a hot topic, it's important to look at the necessary functions on your website. There are certainly many great websites that use sliders efficiently, however, studies are proving that sliders aren't such a good idea.
Yoast wrote a great article on the science behind this here: https://yoast.com/opinion-on-sliders/
So do you feel that there are sliders that work well (in relation to conversion rates)? Sliders like this one could be a good alternative http://www.ajaxshake.com/demo/EN/901/0c37dfa2/sliding-stacked-images-with-jquery-slidingstacked.html