Haven't used it - just looked at in educator catalog, it's $17.95 without the quail eggs.....I know the manufacturer is good for their cabinet incubators, so perhaps this will translate well with small tabletop (3 chicken eggs)....
https://www.gqfmfg.com/store/comersus_viewItem.asp?idProduct=272
Hope this helps!
The GQF chick-bator is junk. Don't waste your money. Buy a GQF hova-bator with a fan the 1588 model being the best or a Brinsea if you can afford it.