I bought an inexpensive one online and it is pretty awesome. You can set your steaks for whatever you want, rare, medium-rare, whatever, and it’s good to go after a couple hours. The cool thing is you can keep them “cooking” for a good hour or two after they are done, then when you’re ready to eat, just throw them on a cast iron to sear the outside for a couple minutes and you have a perfectly cooked steak. I’ve used it for chicken with similar results.