Here are a few things to consider. I got this grill through kick starter and have smoked ribs as good as on my offset stick burner.  You must let it heat up first,  this is why people are having their temps swing into the 400s.  Read the manual,  it is the initial burn phase,  if you adjust temp during this you will get high temps.  Second,  use the upper rack to put a small water tray.  Steam helps regulate the temp of the smoker.  I have used this many times without issue, the most I get is a 25 degree temp swing.  For the price,  I am fine with that.