We had a little inaugural burn-in yesterday evening. It took us some time to slowly heat the thing for the first time. Best not to use it full blast, the cement inside needs to warm up slowly so it doesn't crack open. After a while we heard strange hissing sounds coming from within. Probably some moisture evaporating.
We weren't too sure if the fire was still going, it's awfully quit and the window is too small to see anything.
It'll take some getting used to how to light it properly and how to have it give off enough warmth without burning too much wood at the same time.