This is my first ever hatch. I'm using a Brinsea Mini Advance. I ended up getting 2 of those and they're incredibly easy to use. Just add water to one side of reservoir every few days. Temperature is very steady at 99.5. I started with 8 shipped eggs that arrived very carefully wrapped & packed. They were shipped across the country during winter, so I'm pretty ambitious. When I candled with an ovascope at day 7, 4 appeared infertile, 1 of those was very porous. I removed them and cracked them, definitely infertile. The air cells are crazy looking in the remaining eggs, more than saddle shaped. For my next batch of shipped eggs, Iwon't turn them for the first few days in the incubator. Movement visible in remaining 4 eggs. Yesterday I went into lockdown & heard peeping!! One is pipping/ zipping (started last night). Tomorrow is 21 days and I'm beyond excited (and also scared about complications & having weird hatching dreams about the temp spiking and my eggs catching on fire!). I also have 8 blue Marans eggs, that I got locally from a breeder in my other incubator. 8/9 were fertile and are progressing. Due exactly one week after my orpingtons. Really wonderful experience with both breeders who are BYC members!