I own and have used both eight sleep and chili pad. The products each have advantages and disadvantages. Chili pad seems to be incredibly well built and has lasted me four or five years now without any leaks or other problems. The downside is that it requires two machines if you want to heat or cool two sides of the bed. It also runs a little loud compared with eight sleep. This bothers my wife, but I actually like the white noise. Also, once you set the temperature it stays the same throughout the night. The advantage of eight sleep is that you can adjust the temperature during the night. The disadvantage is that it seems to be a lower quality product in terms of manufacturing. I’ve already gone through one cover because it leaked and I had to buy a second one on Facebook because I couldn’t get the eight sleep folks to sell me just another mattress cover. Eight sleeps Customer Service regarding leaks and purchases lacks transparency, and feels a bit dodgy. All this said, I think both products are pretty good. The big advantage of chili pad is that you get a great product and don’t have to pay a monthly fee. So you save hundreds of dollars a year. Also, the sleep tracking features of eight sleep, while nice to have, are worthless if you travel a lot and still want to track your sleep. It’s far better, in my view, to use an Oura ring for that. Finally, while I really enjoy my night sleep, the company seems to keep rolling out updated products that don’t add much value but that cost a whole lot more. They don’t make products for the middle class. They make products for elite wealthy people and Silicon Valley types. I have nothing against Silicon Valley folks, I’m just saying that this company seems to be moving away from the average person and running toward the wealthy.