Cammoo, which I belive may be Chinese for "never heard of it." But it was well reviewed and a bit cheaper a few months back from its current $299 price tag. It's also really robust. They have lots of different models/sizes/configurations and Cambro-style transport warmers. My first experience involved a lot of food. So I was playing with the dial to keep things around 150F. In other words, the random numbers on the dial didn't line up precisely with the thermostat (apparently near the middle rack). I may have to use a remote-probe thermometer to dial it in, but for what I was doing on Thanksgiving, a 10 degree differential wasn't a big deal. If I'm holding a brisket or some such, I'll probably employ some extra technology to keep an eye on things. But I also didn't have any water in the pan, which probably helps serve as a heat sink. For the $260 or so I paid, I'm very happy with it.
https://www.amazon.com/Commercial-Stainless-Single-Tempered-Adjustable-Countertop/dp/B0DZWTJZBL/ref=sr_1_18?crid=212WTEUQFY9G0&dib=eyJ2IjoiMSJ9.ZRSxhS-30eArF1n8J0YPrzotr3GpHEo2bqPsng_mKBFRXNT9lZGD6-HmAHcbp45Rr6DEifGej0KlOzsB1Iltzneed3ywtmqjH-PU_SgQWAdR58BxWhRXB8d9fJ6JPJfyXgJnKnyIBmfuiHDfFng7H8CkYGx19oQzsUjXqN_mhMrRdUwbFc68Zgr9PR8bw9MY6_r2eRx8zWVEAypj05ekJ0odo0aAF_8ppZrJGyUSAdiDq8Bzjocdt2kjQLZ8NW7tiuwWXglkPub3wKQZGD-T7uiKnS6RqzhfDDbSFyeeWkw.Kn_jfB-sAQaaAWKtjZD0iv3PwQRFemv6XM4HR3mxwtE&dib_tag=se&keywords=cammoo&qid=1764732937&s=home-garden&sprefix=cammo%2Cgarden%2C340&sr=1-18