I have two different model styro-Hovas and have hatched many chicks in each one. They seem to work as well as any other incubator. Both mine have wafers and do need some babysitting, but for the price, they're okay. My Fridge-a-Bator holds steadier than any other bator I own, but won't hold a turner so I only use it to hatch on occcasion.
The older square one has a design flaw, some air holes in the bottom of the base of it. That one didn't come with a plastic water tray (was a yard sale find) and it will leak if the water isn't put into the proper channel in the base. We plugged those holes with silicone and burned some holes up the sides instead.
The older square one has a design flaw, some air holes in the bottom of the base of it. That one didn't come with a plastic water tray (was a yard sale find) and it will leak if the water isn't put into the proper channel in the base. We plugged those holes with silicone and burned some holes up the sides instead.