I have a 3-1/2 lb. chuck roast in for a 72 hour cook at 132 degrees that we'll be eating tonight. It will be medium rare throughout and more tender than the finest filet mignon you've ever had. In the bag with it are 4 large sprigs of rosemary, a couple bunches of thyme and a couple tablespoons of minced garlic, which, with the rendered collagen from the roast and a splash of wine will make a superb pan sauce after I finish sear when the meat is done. (I also pre sear)
My unit is a 1200 watt Nutrichef from Amazon. I think I paid around $80 last Winter. Wifi and Bluetooth could not be less important to me, but the extra power is nice. Why people think they need an app to turn the unit on and set the temp eludes me completely. Those controls are part of the unit. The fact I have a smartphone does not mean I need it to run my life.