I bought a top brand incubator for over $150.00 and it will not hold the temps worth a darn. From 104 this morning to 92 this evening I am more than disgusted. And this is after having to build a foam insulating box to cover it to help soften ambient temperature changes. That said it is not a brand that is a foam box. I have 40 eggs in it at the moment and luckily I only bought 12 White Rock eggs for $16.00 so I am not out that much. All I can do now is try to keep on top of the temps and hope for the best. Before demanding a refund of the manufacturer. Sorry. I had to vent somewhere. I do have a large Omaha steaks styrofoam box that I think will be getting converted into an incubator. Luckily I work as a electrical engineer for Siemens so I can integrate an RTD temperature sensor into my PLC home control system and keep the temperature rock solid in the future. And I can do that for a whole lot less than I paid for this #$^^[email protected]! incubator.