Clean, long burning alternative to cord wood. We use Enviro Briquettes because we have no where to store cord wood and this ha worked out wonderfully. Very little ash is also a big concern. We don't have a garden or large backyard to spread the ash on. Storage because of the consistent size is also a helpful consideration for us. I have tried the fire logs, and Envirologs and they all produce more ash less heat and honestly I have had to use more of each to produce the same amount of heat from my stove.