my cresteds like them although i don't feed them to the cresteds often because they are able to escape from the cages/setup i use. i am thinking about putting some bug stop along the edge of a medium sized deli cup and serving the roaches to them that way so they can't escape.
go by the caresheet on blaptica and the dubia should thrive and breed quite well.they are also the least smelly roach i've kept--virtually no smell at all!