Want to add one to our new basic, Brinsea Octogon Eco 20. Feed store had nothing yesterday. Amazon is flooded with them, but reviews are up and down and thus, looking for personal experience. Thanks.
I have a little rectangular one I got from Petsmart for $20, it was in the reptile section. I mounted it to my ECO with the included velcro, and it does a really good job on the humidity. It shows the temperature as lower than the actual temperature however, so I still gauge the temperature with the included glass thermometer. It shows the temperature correctly if moved where the eggs actually sit.