Just make sure you keep them warm, they don't transmit heat as well as some other mediums. With those it's easy to keep them too wet or too dry, as well - just be careful - you want a happy medium - moist, but not dripping wet.
As for transplanting - there are really no tricks. Once your baby has sprouted in that thing, you treat it as if it were part of the root of the plant. Some folks peel off the net before planting, I never have. Up to you.