All machines have short comings. The Genesis is a very good machine and you can hatch in it. Professionals prefer to reduce the temp and turn the fan off during lockdown, but it is not neccessary. It is very roomy, which is good when they hatch. You don't want a machine were the eggs are laying right next to each other, because it does not give you space for hatching. It is always a good idea to have a hatcher, because there is a lot of mess when they hatch and it can make the machine dirty or unsanitary. The Genesis has a plastic tray below, which can be taken out and should be cleaned each time. This machine is perfect, if you only plan on having a few hatches per year. Once you plan on having lots of hatches then it is time to upgrade to a larger machine. The other good news is that you can buy a replacement foam base or lid for not much money, which allows you to replace these parts. It holds the heat well and long, even when you have a power outage, because the foam is so insulating. The other machines do not have this! So don't rule this machine out, because the other machines have about the same short comings when it comes to changing temp or turning off the fan.