I had a Hova-bator for at least 25 years with easy great results. Last summer, in the middle of a hatch, it finally died. I bought the new Hova-bator with air circulation and an egg turner, just under $90 plus the cost of the turner. I have not had 1 successful hatch out of 5 or 6 since last summer. I kept thinking I was doing something wrong-perhaps the thermometer, so I bought a pricy one.My June hatch, 3 chicks out of 48, they were very late, making me think it was the thermometer. All the dead chicks were so close to hatching, so sad, full grown chicks dead in the shell. The same flock gave me 2 good hatches last summer in the old incubator. I have gone through the troubleshooting lists and conclude it is a bad incubator. IT WAS ALWAYS SO EASY WITH THE OLD ONE! Jeffers has offered to replace it for a reduced cost. So what do all of the eggsperts think?