condensation is cause by a difference in temp not having too much water.
the only bad thing about the lid is when the eggs start to dimple in roughly 10 to 14 days before hatching, they require much more oxygen. with the press n seal I peel a corner back for a very small opening to let air exchange without losing alot of humidity. the lids I drill a couple small holes in and when the hatchlings start to peep I replace the press n seal with the lid so no hatchlings leave the box.
many ways to go about incubating eggs and getting the same results. It comes down to what works the best for you.