Pros: Easy to use. Great hatch rate even on my first time ever!
Cons: Looses himidity quick
Super easy to use. Just follow directions and you'll have your eggs hatching for sure.
It was my first time ever: 28 out of 40 eggs were fertile on day 7. Then on hatching day, 2 didn't do anything at all, 2 peeped but didn't make it, and the other 24 all survived!!!
One thing you need to make sure you keep an eye on is the humidity. It does loose it pretty quick, every 3 or 4 days I had to add more water, but I did leave the holes unplugged for better ventilation/oxygen.