Either ours is not working right,we are doing something wrong, or the description doesn't fit the product. There is no randomness to the flames or embers. It looks like a wheel with lights beaming off it spinning inside. It is quite obvious as soon as you turn it on. We'll see how the heater works in the room this winter but that is not the reason we bought it. It seems to put out heat well though.

Pros: Heater seems good
Cons: No randomness to either the flames or embers.