Immediately after the break-in, before the first swaddling, modify the filter, otherwise the combustion chamber will be clogged with dust, and scoring cannot be avoided. Has some pros: Works flawlessly, out of the box, cold starts easily and quickly. Does not choke when sawing a larger log diameter than recommended. With its cons: The air filter is a toy, I had to modify it, I found a lot of recommendations on YouTube, it cost a piece of foam and fabric from a medical mask.