I am quite pleased with mine.  Initially I had the flare up problem, but it was successfully corrected by sealing the bottom seam with JB Weld.  Preheating was a problem when the stove was not completely filled (~ 1.5 oz.).  It takes about 0.5 ounce of alcohol to boil a 10 ounce cup of water (Lid and windscreen).  To preheat with less than a full stove I place a BB or pebble over the center (fill) hole so that more alcohol is retained in the center.  A bottle cap containing a little alcohol may be placed beneath the Triad to preheat it as well.  I am more comfortable with the strength of the Triad verses my Pepsi can version, and it only weighs 1 ounce (vs 0.5 oz. for the Pepsi can).  Great little stove IMHO. 
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PROVERBS  21:19