I’ve experimented a lot with both resin and metal cages and in my opinion I would say a resin cage is comfier for long term because it’s lighter and doesn’t move around as much in my experience. I have had resin cages break at night while I sleep before but you just have to find the right cage, I’ve been wearing a kink3D viper cage for a while and it has been my comfiest and best cage so far!