I tried Eight Sleep Pod 5, the smart mattress cover that promises to improve my sleep Honest Eight Sleep Pod 5 review: What I loved and didn't love about a $3,000 bed Mashable CNET Managing Editor Nasha Addarich Martnez will be testing Eight Sleeps temperature controlled sleep system, the Pod 5 Core, over the course of the next few weeks. Unbox this $3,000 smart mattress Eight Sleep Introduces Pod 5: The First AI Powered Sleep System with Immersive Temperature, Zero Gravity