first time hatching eggs. easy set up, easy instructions. like others, we struggled at first to keep humidity and temperature, optimal. We add water, we don't leave the bottle attached. at times, we have to lightly lift a corner of the lid to release/reset humidity. has a loud alarm to let you know if temps or humidity fluctuate too much. built in candlelight. very happy with this and are 3 days out from removing the rollers on the first 6 we put in so they can hatch. waited 3 plus weeks to write this review so I could give an honest, first hand review. this incubator holds a variety of egg sizes/types so you're not limited to chickens. extreme ease of use, for first timers. rolls the eggs to front due to their shape, so you need to check it when you candlelight and move them to the far side to make sure they dont push the first ones up and not turn. do not use even slightly cracked eggs due to bacteria. you can custom set temp and humidity or it has presets for chicken, duck, goose and pigeon. operation is made easier because of the indicator lights and alarm, and shows when the eggs are turning. fan runs constantly but it is very low and causes no irritating or distracting noise. ***WE DID CHOOSE TO KEEP THE INCUBATOR IN THE ORIGINAL BOTTOM STYROFOAM TO HELP REGULATE TEMPERATURE MUCH MUCH EASIER ***