Are the manufactured/store bought logs OK to use?
If you do not have time for a wood burning fire or just want a “simple” fire the Duraflame logs may be a good idea. They produce less heat, smoke, and smell, and leave few ashes. Best of all they do not have popping embers and are clean burning. There has been no evidence that they negatively affect a chimney. Just make sure that you use only one at the time.