I'm happy with mine. Folks say burn driftwood, coal, etc. but I tried all those and found if you depend on it for your main source if heat it doesn't live up to what you expected.
I use mine to take the chill off cool mornings. I keep 2 or 3 of those wax fireplace logs
and saw them in half. No smoke, embers or odor
. But I never go to bed
with any trace of them still glowing.
Its great having a fire burning on a cool night!