According to Comparaboo, a site devoted to product reviews, the top-rated heating pad on the market is the Sunbeam 2013-912 XpressHeat Heating Pad, with an overall score of 9.9 out of 10. This product is also Amazon's bestseller in the heating pad category, as of June 2015.
The Sunbeam 722-810 King Size Heating Pad with UltraHeatTechnology, which scores a 9.0, is the second-highest rating heating pad on Comparaboo. Sunbeam products fill the top eight slots on Amazon in the heating pad category. Best Reviews also rates Sunbeam products favorably and includes two Thermophore heating pads, the Classic and the Standard, in its list of the top 10 best-rated heating pads.