What's not so good, is that burner inserters seem to always try to pick up fuel as their first item, even if you dumped a whole stack of coal into them at the start (or if another burner inserter fueled them). This results in them trying to make gears (and other items) out of coal, as shown in the attached screenshots.
Also, thank you so much for making burner inserters keep themselves fueled even if the attached machine doesn't request fuel. This will make them vastly more practical to use.
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)