Thought this info might be helpful to others. I have a Brinsea mini advance incubator that runs flawlessly. I recently purchased a Little giant at tractor supply. I had both in an insulated room in my shop, and temps in there fluctuates about 10-15 degrees. I was extremely frustrated with the little giant, I was having a really hard time maintaining temps. As soon as I moved the little giant into my house where temps stay about 70 degrees all the time THE LITTLE GIANT is doing well at maintaining a constant temp. I would have giving the little giant a bad review if I first had not put it in the house. I'm comfortable with its performance now. It's the still air model, I do use a seperate temp and humidity sensor , the one on it seems to be off about 3 degrees.