Good product you need 2 hydrometer in the tank one at bottom and top to meet temps in the middle. I got this for ball Python eggs and im testing it for 30day so far I have been able to keep consistent temps and humidity between 88-90 degrees and 90-100 humidity.
There is a fair amount of temperature difference between the top and bottom of the box, but in the off season I plan on adding an internal fan so it should remedy that issue. I give this purchase 5 stars otherwise for cost/operation.
I use this for a DIY at home Molecular Biology lab and it does a great job for culturing bacteria. Whether using this for biology or incubating reptile eggs, it works!