Only gets 4 stars. If unit is not perfectly level gas flame tends to walk back and forth.  Meaning flame goes out on one side and then build enough pressure to reignite as the other side dies out.  Reappears in other direction.

I do have this unit hooked to a natural gas line which might be the issue, but not 100 sure it is.

Also when running at various gas levels you get a hiss that can be annoying.

But when it is tuned or dialed in right there are hours of enjoyment.