heat panel

Found this heat panel online and was wondering if anyone has one of these? Or any experience regarding this specific product from Reptizoo. https://reptizoo.store/products/reptile-heat-panel-adjustable-temperature-reptile-heating-plate

I just bought a large new vivarium for my little hermann's, she is only a little over 1 year old and about 4 inches. The vivarium is 5 feet long and 2 feet high and wide. The vivarium was 2nd hand, I found it online from someone who kept a Boa constrictor. It has a UV strip already fitted and it...