I like the cartons for hatching but that's just my personal choice some don't like it and if you have a wrong end pipper it can be hard to spot. I would suggest though if you do hatch in cartons that you don't do it with individual cups. Once the first chick has hatched it will knock the individual ones over. I use a whole six cut down or at least two still connected. That way they are more stable.
Good luck with your eggs
Good luck with your eggs